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CVE-2026-65904

DOMPurify through 3.3.3 fails to sanitize DOM elements passed via IN_PLACE mode when the element originates from a different window/realm (e.g., an iframe's contentDocument). A cross-realm instanceof check in the private _isNode() function returns false for foreign-realm nodes, causing DOMPurify to stringify the element (yielding '[object HTMLDivElement]'), silently reset IN_PLACE to false, and return the unsanitized element unchanged with any XSS payloads intact.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:be9d867e0dbfa05d7689bedf9540866469bca0a8cc2e9b53e26d4532998187bc
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":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/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:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:npm/dompurify","product":"DOMPurify","vendor":"cure53","versions":[{"lessThanOrEqual":"3.3.3","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/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:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-754","description":"Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-4w3q-35jp-p934"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-4w3q-35jp-p934)","tags":["vendor-advisory"],"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-4w3q-35jp-p934"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/references/0
{"name":"VulnCheck Advisory: DOMPurify before 3.4.4 Cross-Site Scripting via IN_PLACE mode","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/dompurify-before-cross-site-scripting-via-in-place-mode"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e5a1ff96d53063c9ee802526e0119ec367dd159925d461857f4ebc03e75dae69 · sha256:ac0578fec63d7853… · /containers/cna/references/1

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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