CVE-2026-8888

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8888", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "state": "PUBLISHED", "assignerShortName": "certcc", "dateReserved": "2026-05-18T20:40:05.298Z", "datePublished": "2026-06-03T18:16:25.264Z", "dateUpdated": "2026-06-04T19:48:31.510Z"}, "containers": {"cna": {"title": "CVE-2026-8888", "descriptions": [{"lang": "en", "value": "Version 3.0.7 of the Securly Chrome Extension downloads config.json over HTTP and compiles server-provided patterns as JavaScript regular expressions via new RegExp() without complexity validation. An on-path attacker can inject specific patterns to cause catastrophic backtracking, resulting in denial of service on all browsing."}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Securly", "product": "Securly Chrome Extension", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "3.0.7", "versionType": "custom"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-1333"}]}], "references": [{"url": "https://kb.cert.org/vuls/id/595768"}], "x_generator": {"engine": "VINCE 3.0.42", "env": "prod", "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-8888"}, "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-06-03T18:18:13.249Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-1333", "lang": "en", "description": "CWE-1333 Inefficient Regular Expression Complexity"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-06-04T19:48:22.314942Z", "id": "CVE-2026-8888", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"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": "2026-06-04T19:48:31.510Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-8888", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-04T19:48:22.314942Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1333", "description": "CWE-1333 Inefficient Regular Expression Complexity"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-04T19:48:09.767Z"}}], "cna": {"title": "CVE-2026-8888", "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Securly", "product": "Securly Chrome Extension", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "3.0.7"}]}], "references": [{"url": "https://kb.cert.org/vuls/id/595768"}], "x_generator": {"env": "prod", "engine": "VINCE 3.0.42", "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-8888"}, "descriptions": [{"lang": "en", "value": "Version 3.0.7 of the Securly Chrome Extension downloads config.json over HTTP and compiles server-provided patterns as JavaScript regular expressions via new RegExp() without complexity validation. An on-path attacker can inject specific patterns to cause catastrophic backtracking, resulting in denial of service on all browsing."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-1333"}]}], "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-06-03T18:18:13.249Z"}}}, "cveMetadata": {"cveId": "CVE-2026-8888", "state": "PUBLISHED", "dateUpdated": "2026-06-04T19:48:31.510Z", "dateReserved": "2026-05-18T20:40:05.298Z", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "datePublished": "2026-06-03T18:16:25.264Z", "assignerShortName": "certcc"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "Securly Chrome Extension", "vendor": "Securly", "versions": [{"lessThanOrEqual": "3.0.7", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "cret@cert.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:securly:securly:3.0.7:*:*:*:*:chrome:*:*", "matchCriteriaId": "CF6B029B-B152-4A34-AC5B-A417EB476C87", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Version 3.0.7 of the Securly Chrome Extension downloads config.json over HTTP and compiles server-provided patterns as JavaScript regular expressions via new RegExp() without complexity validation. An on-path attacker can inject specific patterns to cause catastrophic backtracking, resulting in denial of service on all browsing."}, {"lang": "es", "value": "La versi\u00f3n 3.0.7 de la Securly Chrome Extension descarga config.json sobre HTTP y compila patrones proporcionados por el servidor como expresiones regulares de JavaScript a trav\u00e9s de new RegExp() sin validaci\u00f3n de complejidad. Un atacante en la ruta puede inyectar patrones espec\u00edficos para causar un retroceso catastr\u00f3fico, resultando en denegaci\u00f3n de servicio en toda la navegaci\u00f3n."}], "id": "CVE-2026-8888", "lastModified": "2026-07-22T20:10:00.127", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8888", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-04T19:48:22.314942Z", "version": "2.0.3"}}]}, "published": "2026-06-03T19:16:39.807", "references": [{"source": "cret@cert.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://kb.cert.org/vuls/id/595768"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-917"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-1333"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.0.7]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Securly Chrome Extension", "source": "cna", "vendor": "Securly"}, "product": "securly_chrome_extension", "vendor": "securly"}], "created": "2026-06-03T20:30:36.508258+00:00", "title": "Denial of Service via Server\u2011Provided Regex Injection", "updated": "2026-06-05T22:30:06.177579+00:00", "vendors": ["securly", "securly$PRODUCT$securly_chrome_extension"]}