CVE-2026-68749

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68749", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "state": "PUBLISHED", "assignerShortName": "EEF", "dateReserved": "2026-07-31T13:23:00.355Z", "datePublished": "2026-08-06T14:50:12.593Z", "dateUpdated": "2026-08-19T11:48:20.102Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.HtmlSanitizeEx.Scrubber.CSS'", "'Elixir.HtmlSanitizeEx'"], "packageName": "html_sanitize_ex", "packageURL": "pkg:hex/html_sanitize_ex", "product": "html_sanitize_ex", "programFiles": ["lib/html_sanitize_ex/scrubber/css.ex", "lib/html_sanitize_ex.ex"], "programRoutines": [{"name": "'Elixir.HtmlSanitizeEx.Scrubber.CSS':scrub/1"}, {"name": "'Elixir.HtmlSanitizeEx':html5/1"}], "repo": "https://github.com/rrrene/html_sanitize_ex", "vendor": "rrrene", "versions": [{"lessThan": "1.4.5", "status": "affected", "version": "0.3.1", "versionType": "semver"}, {"lessThan": "1.5.3", "status": "affected", "version": "1.5.0-rc.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.HtmlSanitizeEx.Scrubber.CSS'", "'Elixir.HtmlSanitizeEx'"], "packageName": "rrrene/html_sanitize_ex", "packageURL": "pkg:github/rrrene/html_sanitize_ex", "product": "html_sanitize_ex", "programFiles": ["lib/html_sanitize_ex/scrubber/css.ex", "lib/html_sanitize_ex.ex"], "programRoutines": [{"name": "'Elixir.HtmlSanitizeEx.Scrubber.CSS':scrub/1"}, {"name": "'Elixir.HtmlSanitizeEx':html5/1"}], "repo": "https://github.com/rrrene/html_sanitize_ex", "vendor": "rrrene", "versions": [{"changes": [{"at": "4f4bd9eb254881462c0461fbab74b29188c2c133", "status": "unaffected"}, {"at": "b673df33ddf982c8bd0a8bd6348aa247080b3b14", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "21f90012eb21aa36f4e3701b7547e12faf0f3c8b", "versionType": "git"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Only <code>HtmlSanitizeEx.html5/1</code>, and custom scrubbers declared with <code>use HtmlSanitizeEx, extend: :html5</code>, route input into the CSS scrubber, by way of <code>&lt;style&gt;</code> element bodies and <code>style</code> attributes. Applications calling <code>HtmlSanitizeEx.Scrubber.CSS.scrub/1</code> directly are also affected.</p>"}, {"base64": false, "type": "text/markdown", "value": "Only `HtmlSanitizeEx.html5/1`, and custom scrubbers declared with `use HtmlSanitizeEx, extend: :html5`, route input into the CSS scrubber, by way of `<style>` element bodies and `style` attributes. Applications calling `HtmlSanitizeEx.Scrubber.CSS.scrub/1` directly are also affected."}], "value": "Only HtmlSanitizeEx.html5/1, and custom scrubbers declared with use HtmlSanitizeEx, extend: :html5, route input into the CSS scrubber, by way of <style> element bodies and style attributes. Applications calling HtmlSanitizeEx.Scrubber.CSS.scrub/1 directly are also affected."}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.4.5", "versionStartIncluding": "0.3.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.5.3", "versionStartIncluding": "1.5.0-rc.0", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "AND"}], "credits": [{"lang": "en", "type": "finder", "value": "Peter Ullrich"}, {"lang": "en", "type": "analyst", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "remediation developer", "value": "Ren\u00e9 F\u00f6hring"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in <code>HtmlSanitizeEx.Scrubber.CSS.scrub/1</code> matches the property name with an unbounded greedy <code>[-\\w]+</code> followed by a mandatory <code>:</code>, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB <code>&lt;style&gt;</code> body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.</p>\n<p>The impact is CPU exhaustion only. Nothing is read, modified or disclosed.</p>\n<p>This issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3.</p>"}, {"base64": false, "type": "text/markdown", "value": "Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in `HtmlSanitizeEx.Scrubber.CSS.scrub/1` matches the property name with an unbounded greedy `[-\\w]+` followed by a mandatory `:`, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB `<style>` body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.\n\nThe impact is CPU exhaustion only. Nothing is read, modified or disclosed.\n\nThis issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3."}], "value": "Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in HtmlSanitizeEx.Scrubber.CSS.scrub/1 matches the property name with an unbounded greedy [-\\w]+ followed by a mandatory :, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB <style> body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.\n\nThe impact is CPU exhaustion only. Nothing is read, modified or disclosed.\n\nThis issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3."}], "impacts": [{"capecId": "CAPEC-492", "descriptions": [{"lang": "en", "value": "CAPEC-492 Regular Expression Exponential Blowup"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 8.2, "baseSeverity": "HIGH", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-1333", "description": "CWE-1333 Inefficient Regular Expression Complexity", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-08-19T11:48:20.102Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/rrrene/html_sanitize_ex/security/advisories/GHSA-4cx2-987x-rr2x"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-68749.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-68749"}, {"tags": ["patch"], "url": "https://github.com/rrrene/html_sanitize_ex/commit/4f4bd9eb254881462c0461fbab74b29188c2c133"}, {"tags": ["patch"], "url": "https://github.com/rrrene/html_sanitize_ex/commit/b673df33ddf982c8bd0a8bd6348aa247080b3b14"}], "source": {"discovery": "EXTERNAL"}, "title": "Quadratic regex backtracking in the html_sanitize_ex CSS scrubber allows CPU-exhaustion denial of service", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Sanitize with <code>basic_html/1</code>, <code>markdown_html/1</code> or <code>strip_tags/1</code>, none of which reach the CSS scrubber, or define a custom scrubber that allows neither <code>&lt;style&gt;</code> elements nor <code>style</code> attributes.</p>\n<p>Capping the size of user-supplied HTML before it reaches the sanitizer bounds the cost, though the quadratic growth means the cap has to be small to be effective.</p>"}, {"base64": false, "type": "text/markdown", "value": "Sanitize with `basic_html/1`, `markdown_html/1` or `strip_tags/1`, none of which reach the CSS scrubber, or define a custom scrubber that allows neither `<style>` elements nor `style` attributes.\n\nCapping the size of user-supplied HTML before it reaches the sanitizer bounds the cost, though the quadratic growth means the cap has to be small to be effective."}], "value": "Sanitize with basic_html/1, markdown_html/1 or strip_tags/1, none of which reach the CSS scrubber, or define a custom scrubber that allows neither <style> elements nor style attributes.\n\nCapping the size of user-supplied HTML before it reaches the sanitizer bounds the cost, though the quadratic growth means the cap has to be small to be effective."}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-06T15:44:14.739175Z", "id": "CVE-2026-68749", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-06T15:44:22.358Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-68749", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-06T15:44:14.739175Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-06T15:44:18.372Z"}}], "cna": {"title": "Quadratic regex backtracking in the html_sanitize_ex CSS scrubber allows CPU-exhaustion denial of service", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Peter Ullrich"}, {"lang": "en", "type": "analyst", "value": "Jonatan M\u00e4nnchen / EEF"}, {"lang": "en", "type": "remediation developer", "value": "Ren\u00e9 F\u00f6hring"}], "impacts": [{"capecId": "CAPEC-492", "descriptions": [{"lang": "en", "value": "CAPEC-492 Regular Expression Exponential Blowup"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"cpes": ["cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*"], "repo": "https://github.com/rrrene/html_sanitize_ex", "vendor": "rrrene", "modules": ["'Elixir.HtmlSanitizeEx.Scrubber.CSS'", "'Elixir.HtmlSanitizeEx'"], "product": "html_sanitize_ex", "versions": [{"status": "affected", "version": "0.3.1", "lessThan": "1.4.5", "versionType": "semver"}, {"status": "affected", "version": "1.5.0-rc.0", "lessThan": "1.5.3", "versionType": "semver"}], "packageURL": "pkg:hex/html_sanitize_ex", "packageName": "html_sanitize_ex", "programFiles": ["lib/html_sanitize_ex/scrubber/css.ex", "lib/html_sanitize_ex.ex"], "collectionURL": "https://repo.hex.pm", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.HtmlSanitizeEx.Scrubber.CSS':scrub/1"}, {"name": "'Elixir.HtmlSanitizeEx':html5/1"}]}, {"cpes": ["cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*"], "repo": "https://github.com/rrrene/html_sanitize_ex", "vendor": "rrrene", "modules": ["'Elixir.HtmlSanitizeEx.Scrubber.CSS'", "'Elixir.HtmlSanitizeEx'"], "product": "html_sanitize_ex", "versions": [{"status": "affected", "changes": [{"at": "4f4bd9eb254881462c0461fbab74b29188c2c133", "status": "unaffected"}, {"at": "b673df33ddf982c8bd0a8bd6348aa247080b3b14", "status": "unaffected"}], "version": "21f90012eb21aa36f4e3701b7547e12faf0f3c8b", "lessThan": "*", "versionType": "git"}], "packageURL": "pkg:github/rrrene/html_sanitize_ex", "packageName": "rrrene/html_sanitize_ex", "programFiles": ["lib/html_sanitize_ex/scrubber/css.ex", "lib/html_sanitize_ex.ex"], "collectionURL": "https://github.com", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.HtmlSanitizeEx.Scrubber.CSS':scrub/1"}, {"name": "'Elixir.HtmlSanitizeEx':html5/1"}]}], "references": [{"url": "https://github.com/rrrene/html_sanitize_ex/security/advisories/GHSA-4cx2-987x-rr2x", "tags": ["vendor-advisory", "related"]}, {"url": "https://cna.erlef.org/cves/CVE-2026-68749.html", "tags": ["related"]}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-68749", "tags": ["related"]}, {"url": "https://github.com/rrrene/html_sanitize_ex/commit/4f4bd9eb254881462c0461fbab74b29188c2c133", "tags": ["patch"]}, {"url": "https://github.com/rrrene/html_sanitize_ex/commit/b673df33ddf982c8bd0a8bd6348aa247080b3b14", "tags": ["patch"]}], "workarounds": [{"lang": "en", "value": "Sanitize with basic_html/1, markdown_html/1 or strip_tags/1, none of which reach the CSS scrubber, or define a custom scrubber that allows neither <style> elements nor style attributes.\n\nCapping the size of user-supplied HTML before it reaches the sanitizer bounds the cost, though the quadratic growth means the cap has to be small to be effective.", "supportingMedia": [{"type": "text/html", "value": "<p>Sanitize with <code>basic_html/1</code>, <code>markdown_html/1</code> or <code>strip_tags/1</code>, none of which reach the CSS scrubber, or define a custom scrubber that allows neither <code>&lt;style&gt;</code> elements nor <code>style</code> attributes.</p>\n<p>Capping the size of user-supplied HTML before it reaches the sanitizer bounds the cost, though the quadratic growth means the cap has to be small to be effective.</p>", "base64": false}, {"type": "text/markdown", "value": "Sanitize with `basic_html/1`, `markdown_html/1` or `strip_tags/1`, none of which reach the CSS scrubber, or define a custom scrubber that allows neither `<style>` elements nor `style` attributes.\n\nCapping the size of user-supplied HTML before it reaches the sanitizer bounds the cost, though the quadratic growth means the cap has to be small to be effective.", "base64": false}]}], "descriptions": [{"lang": "en", "value": "Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in HtmlSanitizeEx.Scrubber.CSS.scrub/1 matches the property name with an unbounded greedy [-\\w]+ followed by a mandatory :, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB <style> body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.\n\nThe impact is CPU exhaustion only. Nothing is read, modified or disclosed.\n\nThis issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3.", "supportingMedia": [{"type": "text/html", "value": "<p>Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in <code>HtmlSanitizeEx.Scrubber.CSS.scrub/1</code> matches the property name with an unbounded greedy <code>[-\\w]+</code> followed by a mandatory <code>:</code>, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB <code>&lt;style&gt;</code> body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.</p>\n<p>The impact is CPU exhaustion only. Nothing is read, modified or disclosed.</p>\n<p>This issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3.</p>", "base64": false}, {"type": "text/markdown", "value": "Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in `HtmlSanitizeEx.Scrubber.CSS.scrub/1` matches the property name with an unbounded greedy `[-\\w]+` followed by a mandatory `:`, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB `<style>` body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.\n\nThe impact is CPU exhaustion only. Nothing is read, modified or disclosed.\n\nThis issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1333", "description": "CWE-1333 Inefficient Regular Expression Complexity"}]}], "configurations": [{"lang": "en", "value": "Only HtmlSanitizeEx.html5/1, and custom scrubbers declared with use HtmlSanitizeEx, extend: :html5, route input into the CSS scrubber, by way of <style> element bodies and style attributes. Applications calling HtmlSanitizeEx.Scrubber.CSS.scrub/1 directly are also affected.", "supportingMedia": [{"type": "text/html", "value": "<p>Only <code>HtmlSanitizeEx.html5/1</code>, and custom scrubbers declared with <code>use HtmlSanitizeEx, extend: :html5</code>, route input into the CSS scrubber, by way of <code>&lt;style&gt;</code> element bodies and <code>style</code> attributes. Applications calling <code>HtmlSanitizeEx.Scrubber.CSS.scrub/1</code> directly are also affected.</p>", "base64": false}, {"type": "text/markdown", "value": "Only `HtmlSanitizeEx.html5/1`, and custom scrubbers declared with `use HtmlSanitizeEx, extend: :html5`, route input into the CSS scrubber, by way of `<style>` element bodies and `style` attributes. Applications calling `HtmlSanitizeEx.Scrubber.CSS.scrub/1` directly are also affected.", "base64": false}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "1.4.5", "versionStartIncluding": "0.3.1"}, {"criteria": "cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "1.5.3", "versionStartIncluding": "1.5.0-rc.0"}], "operator": "OR"}], "operator": "AND"}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-08-19T11:48:20.102Z"}}}, "cveMetadata": {"cveId": "CVE-2026-68749", "state": "PUBLISHED", "dateUpdated": "2026-08-19T11:48:20.102Z", "dateReserved": "2026-07-31T13:23:00.355Z", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "datePublished": "2026-08-06T14:50:12.593Z", "assignerShortName": "EEF"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.HtmlSanitizeEx.Scrubber.CSS'", "'Elixir.HtmlSanitizeEx'"], "packageName": "html_sanitize_ex", "packageURL": "pkg:hex/html_sanitize_ex", "product": "html_sanitize_ex", "programFiles": ["lib/html_sanitize_ex/scrubber/css.ex", "lib/html_sanitize_ex.ex"], "programRoutines": [{"name": "'Elixir.HtmlSanitizeEx.Scrubber.CSS':scrub/1"}, {"name": "'Elixir.HtmlSanitizeEx':html5/1"}], "repo": "https://github.com/rrrene/html_sanitize_ex", "vendor": "rrrene", "versions": [{"lessThan": "1.4.5", "status": "affected", "version": "0.3.1", "versionType": "semver"}, {"lessThan": "1.5.3", "status": "affected", "version": "1.5.0-rc.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:rrrene:html_sanitize_ex:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.HtmlSanitizeEx.Scrubber.CSS'", "'Elixir.HtmlSanitizeEx'"], "packageName": "rrrene/html_sanitize_ex", "packageURL": "pkg:github/rrrene/html_sanitize_ex", "product": "html_sanitize_ex", "programFiles": ["lib/html_sanitize_ex/scrubber/css.ex", "lib/html_sanitize_ex.ex"], "programRoutines": [{"name": "'Elixir.HtmlSanitizeEx.Scrubber.CSS':scrub/1"}, {"name": "'Elixir.HtmlSanitizeEx':html5/1"}], "repo": "https://github.com/rrrene/html_sanitize_ex", "vendor": "rrrene", "versions": [{"changes": [{"at": "4f4bd9eb254881462c0461fbab74b29188c2c133", "status": "unaffected"}, {"at": "b673df33ddf982c8bd0a8bd6348aa247080b3b14", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "21f90012eb21aa36f4e3701b7547e12faf0f3c8b", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:rrrene:htmlsanitizeex:*:*:*:*:*:*:*:*", "matchCriteriaId": "DE85053C-AE84-4570-A90C-4D4CCD7A4BA3", "versionEndExcluding": "1.5.3", "versionStartIncluding": "0.3.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html_sanitize_ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in HtmlSanitizeEx.Scrubber.CSS.scrub/1 matches the property name with an unbounded greedy [-\\w]+ followed by a mandatory :, so a long run of word characters not followed by a colon makes the engine give back one character at a time and retry the colon at every start offset. The work is quadratic in the length of the run, and no length cap is applied to the CSS handed to the scrubber. An 80 KB <style> body costs roughly 2.4 seconds of scheduler time, so a few concurrent requests saturate the BEAM scheduler pool and make the application unresponsive.\n\nThe impact is CPU exhaustion only. Nothing is read, modified or disclosed.\n\nThis issue affects html_sanitize_ex: from 0.3.1 before 1.4.5 and from 1.5.0-rc.0 before 1.5.3."}, {"lang": "es", "value": "Una vulnerabilidad de complejidad de expresi\u00f3n regular ineficiente en el depurador CSS en rrrene html_sanitize_ex permite a un atacante remoto no autenticado agotar la CPU del servidor a trav\u00e9s de una declaraci\u00f3n CSS larga en HTML saneado. La expresi\u00f3n regular de declaraci\u00f3n en HtmlSanitizeEx.Scrubber.CSS.scrub/1 coincide con el nombre de la propiedad con un [-\\w]+ codicioso ilimitado seguido de un : obligatorio, por lo que una secuencia larga de caracteres de palabra no seguida por dos puntos hace que el motor retroceda un car\u00e1cter a la vez y reintente los dos puntos en cada desplazamiento de inicio. El trabajo es cuadr\u00e1tico en la longitud de la secuencia, y no se aplica ning\u00fan l\u00edmite de longitud al CSS entregado al depurador. Un cuerpo [style] de 80 KB cuesta aproximadamente 2.4 segundos de tiempo de planificador, por lo que unas pocas solicitudes concurrentes saturan el pool de planificadores BEAM y hacen que la aplicaci\u00f3n no responda.\n\nEl impacto es solo agotamiento de CPU. Nada es le\u00eddo, modificado o divulgado.\n\nEste problema afecta a html_sanitize_ex: desde 0.3.1 antes de 1.5.3."}], "id": "CVE-2026-68749", "lastModified": "2026-10-24T16:10:00.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-68749", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-06T15:44:14.739175Z", "version": "2.0.3"}}]}, "published": "2026-08-06T16:16:51.720", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch", "Third Party Advisory"], "url": "https://cna.erlef.org/cves/CVE-2026-68749.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch"], "url": "https://github.com/rrrene/html_sanitize_ex/commit/4f4bd9eb254881462c0461fbab74b29188c2c133"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/rrrene/html_sanitize_ex/commit/b673df33ddf982c8bd0a8bd6348aa247080b3b14"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Broken Link"], "url": "https://github.com/rrrene/html_sanitize_ex/security/advisories/GHSA-4cx2-987x-rr2x"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "tags": ["Patch", "Third Party Advisory"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-68749"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1333"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.3.1,1.5.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[21f90012eb21aa36f4e3701b7547e12faf0f3c8b,4f4bd9eb254881462c0461fbab74b29188c2c133)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "html_sanitize_ex", "vendor": "rrrene"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.3.1,1.5.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "html_sanitize_ex", "source": "cna", "vendor": "rrrene"}, "product": "html_sanitize_ex", "vendor": "rrrene"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[21f90012eb21aa36f4e3701b7547e12faf0f3c8b,4f4bd9eb254881462c0461fbab74b29188c2c133)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "html_sanitize_ex", "source": "cna", "vendor": "rrrene"}, "product": "html_sanitize_ex", "vendor": "rrrene"}], "created": "2026-08-06T17:00:11.048005+00:00", "updated": "2026-08-22T11:30:17.160183+00:00", "vendors": ["rrrene", "rrrene$PRODUCT$html_sanitize_ex"]}