{"id":"CVE-2026-65899","sourceIdentifier":"disclosure@vulncheck.com","published":"2026-07-23T14:18:04.683","lastModified":"2026-10-24T13:10:00.147","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"DOMPurify 3.0.0 before 3.4.9 does not reset the retained Trusted Types policy when clearConfig() is called, so a DOMPurify instance reused across trust boundaries stays bound to a previously supplied TRUSTED_TYPES_POLICY. A later caller that requests RETURN_TRUSTED_TYPE output receives a TrustedHTML object created by the old (potentially unsafe) policy rather than a clean default, which can lead to script execution at a Trusted Types sink. Passing TRUSTED_TYPES_POLICY: null on the later call also does not clear the retained policy."},{"lang":"es","value":"DOMPurify 3.0.0 anterior a 3.4.9 no restablece la política de Trusted Types retenida cuando se llama a clearConfig(), por lo que una instancia de DOMPurify reutilizada a través de límites de confianza permanece vinculada a una TRUSTED_TYPES_POLICY suministrada previamente. Un llamador posterior que solicita una salida RETURN_TRUSTED_TYPE recibe un objeto TrustedHTML creado por la política antigua (potencialmente insegura) en lugar de un valor predeterminado limpio, lo que puede conducir a la ejecución de scripts en un sumidero de Trusted Types. Pasar TRUSTED_TYPES_POLICY: null en la llamada posterior tampoco borra la política retenida."}],"affected":[{"source":"disclosure@vulncheck.com","affectedData":[{"vendor":"cure53","product":"DOMPurify","defaultStatus":"unaffected","packageURL":"pkg:npm/dompurify","versions":[{"version":"0","lessThan":"3.4.9","versionType":"semver","status":"affected"},{"version":"3.4.9","versionType":"semver","status":"unaffected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"disclosure@vulncheck.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/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","baseScore":5.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"disclosure@vulncheck.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-27T16:15:29.603133Z","id":"CVE-2026-65899","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"disclosure@vulncheck.com","type":"Secondary","description":[{"lang":"en","value":"CWE-693"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0.0","versionEndExcluding":"3.4.9","matchCriteriaId":"CC7EE4C8-34A0-478F-8F60-6EA9D6FB00EB"}]}]}],"references":[{"url":"https://github.com/cure53/DOMPurify/commit/825e617753ac1169306a542d3174a77f717a0cf6","source":"disclosure@vulncheck.com","tags":["Patch"]},{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-vxr8-fq34-vvx9","source":"disclosure@vulncheck.com","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.vulncheck.com/advisories/dompurify-before-trusted-types-policy-state-contamination","source":"disclosure@vulncheck.com","tags":["Third Party Advisory"]}]}