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CVE-2026-65902

DOMPurify before 3.4.7 (affected versions <= 3.4.5) passes direct references to the module-level DEFAULT_ALLOWED_TAGS and DEFAULT_ALLOWED_ATTR sets to the uponSanitizeElement and uponSanitizeAttribute hooks via data.allowedTags / data.allowedAttributes when sanitize is called without an explicit cfg.ALLOWED_TAGS / cfg.ALLOWED_ATTR array. A hook that mutates these fields permanently widens the default allow-lists for the lifetime of the DOMPurify instance, so all subsequent default-config sanitiz
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d4512fabab114ddcc8cbc4a321bf6c4d6e685b0ddc66758b4a8737e429abe6af
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:npm/dompurify","product":"DOMPurify","vendor":"cure53","versions":[{"lessThan":"3.4.7","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.4.7","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-501","description":"Trust Boundary Violation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/cure53/DOMPurify/commit/7996f1dc78eb8b7922388aed75d94a9f8fad9a36"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-76mc-f452-cxcm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-76mc-f452-cxcm)","tags":["vendor-advisory"],"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-76mc-f452-cxcm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/references/0
{"name":"VulnCheck Advisory: DOMPurify before 3.4.7 Hook Mutation Pollution via allowedTags","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/dompurify-before-hook-mutation-pollution-via-allowedtags"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:129bcc5046e304cce187c7f9963078bb865d91b9465147cc7256ed6cbebe345f · sha256:97273018bd2daaef… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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