CVE-2026-64941

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It rejects a leading <code>//</code> and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as <code>/&lt;TAB&gt;/example.com</code> passes validation as a path and is then resolved as the scheme-relative URL <code>//example.com</code>. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. <code>push_patch/2</code> is also affected before 0.7.0, which is when that expansion was added.</p>\n<p>This issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9.</p>"}, {"base64": false, "type": "text/markdown", "value": "URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a `:to` value containing ASCII tab, LF or CR.\n\n`redirect/2` validates `:to` through the private `validate_local_url!/2` in `lib/phoenix_live_view.ex`, which is intended to guarantee the target is a path within the application. It rejects a leading `//` and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as `/<TAB>/example.com` passes validation as a path and is then resolved as the scheme-relative URL `//example.com`. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. `push_patch/2` is also affected before 0.7.0, which is when that expansion was added.\n\nThis issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9."}], "value": "URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a :to value containing ASCII tab, LF or CR.\n\nredirect/2 validates :to through the private validate_local_url!/2 in lib/phoenix_live_view.ex, which is intended to guarantee the target is a path within the application. It rejects a leading // and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as /<TAB>/example.com passes validation as a path and is then resolved as the scheme-relative URL //example.com. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. push_patch/2 is also affected before 0.7.0, which is when that expansion was added.\n\nThis issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9."}], "impacts": [{"capecId": "CAPEC-3", "descriptions": [{"lang": "en", "value": "CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 2.1, "baseSeverity": "LOW", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-601", "description": "CWE-601 URL Redirection to Untrusted Site ('Open Redirect')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-08-10T11:05:14.571Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-36m4-rm57-3prf"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-64941.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-64941"}, {"tags": ["patch"], "url": "https://github.com/phoenixframework/phoenix_live_view/commit/0b8c733133466912f81adecaea72b6712370242e"}, {"tags": ["patch"], "url": "https://github.com/phoenixframework/phoenix_live_view/commit/1c164f83df0bb922dfff9c60d125da5b0cfd6619"}, {"tags": ["patch"], "url": "https://github.com/phoenixframework/phoenix_live_view/commit/2068b304d71907064b159b6bc60c5ad85a876ecf"}], "source": {"discovery": "EXTERNAL"}, "title": "Open redirect in Phoenix.LiveView.validate_local_url!/2 via ASCII tab, LF and CR", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Reject any untrusted value containing ASCII tab, LF or CR before passing it as <code>:to</code> to <code>redirect/2</code>, or to <code>push_patch/2</code> before 0.7.0. Alternatively, map client-supplied navigation targets to a fixed set of known-good paths rather than forwarding the value.</p>"}, {"base64": false, "type": "text/markdown", "value": "Reject any untrusted value containing ASCII tab, LF or CR before passing it as `:to` to `redirect/2`, or to `push_patch/2` before 0.7.0. Alternatively, map client-supplied navigation targets to a fixed set of known-good paths rather than forwarding the value."}], "value": "Reject any untrusted value containing ASCII tab, LF or CR before passing it as :to to redirect/2, or to push_patch/2 before 0.7.0. 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Alternatively, map client-supplied navigation targets to a fixed set of known-good paths rather than forwarding the value.", "supportingMedia": [{"type": "text/html", "value": "<p>Reject any untrusted value containing ASCII tab, LF or CR before passing it as <code>:to</code> to <code>redirect/2</code>, or to <code>push_patch/2</code> before 0.7.0. Alternatively, map client-supplied navigation targets to a fixed set of known-good paths rather than forwarding the value.</p>", "base64": false}, {"type": "text/markdown", "value": "Reject any untrusted value containing ASCII tab, LF or CR before passing it as `:to` to `redirect/2`, or to `push_patch/2` before 0.7.0. Alternatively, map client-supplied navigation targets to a fixed set of known-good paths rather than forwarding the value.", "base64": false}]}], "descriptions": [{"lang": "en", "value": "URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a :to value containing ASCII tab, LF or CR.\n\nredirect/2 validates :to through the private validate_local_url!/2 in lib/phoenix_live_view.ex, which is intended to guarantee the target is a path within the application. It rejects a leading // and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as /<TAB>/example.com passes validation as a path and is then resolved as the scheme-relative URL //example.com. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. push_patch/2 is also affected before 0.7.0, which is when that expansion was added.\n\nThis issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9.", "supportingMedia": [{"type": "text/html", "value": "<p>URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a <code>:to</code> value containing ASCII tab, LF or CR.</p>\n<p><code>redirect/2</code> validates <code>:to</code> through the private <code>validate_local_url!/2</code> in <code>lib/phoenix_live_view.ex</code>, which is intended to guarantee the target is a path within the application. It rejects a leading <code>//</code> and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as <code>/&lt;TAB&gt;/example.com</code> passes validation as a path and is then resolved as the scheme-relative URL <code>//example.com</code>. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. <code>push_patch/2</code> is also affected before 0.7.0, which is when that expansion was added.</p>\n<p>This issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9.</p>", "base64": false}, {"type": "text/markdown", "value": "URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a `:to` value containing ASCII tab, LF or CR.\n\n`redirect/2` validates `:to` through the private `validate_local_url!/2` in `lib/phoenix_live_view.ex`, which is intended to guarantee the target is a path within the application. It rejects a leading `//` and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as `/<TAB>/example.com` passes validation as a path and is then resolved as the scheme-relative URL `//example.com`. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. `push_patch/2` is also affected before 0.7.0, which is when that expansion was added.\n\nThis issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-601", "description": "CWE-601 URL Redirection to Untrusted Site ('Open Redirect')"}]}], "configurations": [{"lang": "en", "value": "The application must pass an externally influenced value as :to to redirect/2, or to push_patch/2 before 0.7.0, for example a return_to parameter carried through sign-in or a navigation target taken from a handle_event/3 payload.", "supportingMedia": [{"type": "text/html", "value": "<p>The application must pass an externally influenced value as <code>:to</code> to <code>redirect/2</code>, or to <code>push_patch/2</code> before 0.7.0, for example a <code>return_to</code> parameter carried through sign-in or a navigation target taken from a <code>handle_event/3</code> payload.</p>", "base64": false}, {"type": "text/markdown", "value": "The application must pass an externally influenced value as `:to` to `redirect/2`, or to `push_patch/2` before 0.7.0, for example a `return_to` parameter carried through sign-in or a navigation target taken from a `handle_event/3` payload.", "base64": false}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "1.0.19", "versionStartIncluding": "0.5.0"}, {"criteria": "cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "1.1.33", "versionStartIncluding": "1.1.0-rc.0"}, {"criteria": "cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "1.2.9", "versionStartIncluding": "1.2.0-rc.0"}], "operator": "OR"}], "operator": "AND"}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-08-10T11:05:14.571Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64941", "state": "PUBLISHED", "dateUpdated": "2026-08-10T13:00:33.543Z", "dateReserved": "2026-08-09T16:30:01.572Z", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "datePublished": "2026-08-10T11:05:14.571Z", "assignerShortName": "EEF"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://repo.hex.pm", "cpes": ["cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Phoenix.LiveView'"], "packageName": "phoenix_live_view", "packageURL": "pkg:hex/phoenix_live_view", "product": "phoenix_live_view", "programFiles": ["lib/phoenix_live_view.ex"], "programRoutines": [{"name": "'Elixir.Phoenix.LiveView':redirect/2"}, {"name": "'Elixir.Phoenix.LiveView':push_patch/2"}], "repo": "https://github.com/phoenixframework/phoenix_live_view", "vendor": "phoenixframework", "versions": [{"lessThan": "1.0.19", "status": "affected", "version": "0.5.0", "versionType": "semver"}, {"lessThan": "1.1.33", "status": "affected", "version": "1.1.0-rc.0", "versionType": "semver"}, {"lessThan": "1.2.9", "status": "affected", "version": "1.2.0-rc.0", "versionType": "semver"}]}, {"collectionURL": "https://github.com", "cpes": ["cpe:2.3:a:phoenixframework:phoenix_live_view:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["'Elixir.Phoenix.LiveView'"], "packageName": "phoenixframework/phoenix_live_view", "packageURL": "pkg:github/phoenixframework/phoenix_live_view", "product": "phoenix_live_view", "programFiles": ["lib/phoenix_live_view.ex"], "programRoutines": [{"name": "'Elixir.Phoenix.LiveView':redirect/2"}, {"name": "'Elixir.Phoenix.LiveView':push_patch/2"}], "repo": "https://github.com/phoenixframework/phoenix_live_view", "vendor": "phoenixframework", "versions": [{"changes": [{"at": "0b8c733133466912f81adecaea72b6712370242e", "status": "unaffected"}, {"at": "1c164f83df0bb922dfff9c60d125da5b0cfd6619", "status": "unaffected"}, {"at": "2068b304d71907064b159b6bc60c5ad85a876ecf", "status": "unaffected"}], "lessThan": "*", "status": "affected", "version": "b20dba3f65a380b2e4868dae03397f13d2daa070", "versionType": "git"}]}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "URL Redirection to Untrusted Site ('Open Redirect') vulnerability in phoenixframework phoenix_live_view allows an attacker to send a victim's browser to an origin of the attacker's choosing via a :to value containing ASCII tab, LF or CR.\n\nredirect/2 validates :to through the private validate_local_url!/2 in lib/phoenix_live_view.ex, which is intended to guarantee the target is a path within the application. It rejects a leading // and any backslash, but not ASCII tab, LF or CR. Browsers strip those three characters before parsing a URL, so a value such as /<TAB>/example.com passes validation as a path and is then resolved as the scheme-relative URL //example.com. The live navigation functions share the guard but are not affected, because the client expands their target against the current origin. push_patch/2 is also affected before 0.7.0, which is when that expansion was added.\n\nThis issue affects phoenix_live_view: from 0.5.0 before 1.0.19, from 1.1.0-rc.0 before 1.1.33, and from 1.2.0-rc.0 before 1.2.9."}, {"lang": "es", "value": "Vulnerabilidad de redirecci\u00f3n de URL a sitio no confiable (\u2019redirecci\u00f3n abierta\u2019) en phoenixframework phoenix_live_view permite a un atacante enviar el navegador de una v\u00edctima a un origen elegido por el atacante a trav\u00e9s de un valor :to que contiene tabulador ASCII, LF o CR.\n\nredirect/2 valida :to a trav\u00e9s de la funci\u00f3n privada validate_local_url!/2 en lib/phoenix_live_view.ex, que est\u00e1 destinada a garantizar que el objetivo sea una ruta dentro de la aplicaci\u00f3n. Rechaza un // inicial y cualquier barra invertida, pero no el tabulador ASCII, LF o CR. Los navegadores eliminan esos tres caracteres antes de analizar una URL, por lo que un valor como /[TAB]/example.com pasa la validaci\u00f3n como una ruta y luego se resuelve como la URL relativa al esquema //example.com. Las funciones de navegaci\u00f3n en vivo comparten la protecci\u00f3n pero no se ven afectadas, porque el cliente expande su objetivo contra el origen actual. push_patch/2 tambi\u00e9n se ve afectado antes de 0.7.0, que es cuando se a\u00f1adi\u00f3 esa expansi\u00f3n.\n\nEste problema afecta a phoenix_live_view: desde 0.5.0 antes de 1.0.19, desde 1.1.0-rc.0 antes de 1.1.33, y desde 1.2.0-rc.0 antes de 1.2.9."}], "id": "CVE-2026-64941", "lastModified": "2026-10-24T16:10:00.153", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.1, "baseSeverity": "LOW", "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": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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": "NONE", "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-2026-64941", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-10T13:00:10.932600Z", "version": "2.0.3"}}]}, "published": "2026-08-10T12:17:19.873", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-64941.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/phoenixframework/phoenix_live_view/commit/0b8c733133466912f81adecaea72b6712370242e"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/phoenixframework/phoenix_live_view/commit/1c164f83df0bb922dfff9c60d125da5b0cfd6619"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/phoenixframework/phoenix_live_view/commit/2068b304d71907064b159b6bc60c5ad85a876ecf"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-36m4-rm57-3prf"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-64941"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/phoenixframework/phoenix_live_view/security/advisories/GHSA-36m4-rm57-3prf"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.5.0,1.0.19)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.1.0-rc.0,1.1.33)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.2.0-rc.0,1.2.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "phoenix_live_view", "source": "cna", "vendor": "phoenixframework"}, "product": "phoenix_live_view", "vendor": "phoenixframework"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "b20dba3f65a380b2e4868dae03397f13d2daa070"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "phoenix_live_view", "source": "cna", "vendor": "phoenixframework"}, "product": "phoenix_live_view", "vendor": "phoenixframework"}], "created": "2026-08-10T13:00:04.715974+00:00", "updated": "2026-08-10T17:15:02.921866+00:00", "vendors": ["phoenixframework", "phoenixframework$PRODUCT$phoenix_live_view"]}