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  4. CVE 2026 116804 dompurify from 344 before 3417 safefortemplates
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Back to active CVEs
Medium · CVSS 5.1CVE-2026-116804

DOMPurify from 3.4.4 before 3.4.17 SAFE_FOR_TEMPLATES Bypass via Shadow Root ContentCVE-2026-116804

Answer in brief

CVE-2026-116804 records a Medium severity (CVSS 5.1) vulnerability in DOMPurify from 3.4.4 before 3.4.17 SAFE_FOR_TEMPLATES Bypass via Shadow Root Content. The current sources do not mark it as known exploited. The current feed maps cure53/DOMPurify (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 27, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps cure53/DOMPurify (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
cure53/DOMPurifygeneric>=3.4.4 <3.4.173.4.17

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for cure53/DOMPurify.
  2. 2Review the reported fix. Update cure53/DOMPurify to 3.4.17 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

DOMPurify from 3.4.4 before 3.4.17 contains a SAFE_FOR_TEMPLATES bypass that lets attackers preserve template expressions in attached shadow roots when using RETURN_DOM, RETURN_DOM_FRAGMENT, or IN_PLACE modes. Attackers can split expressions across text nodes separated by disallowed elements, which merge after removal and are evaluated by downstream template engines for cross-site scripting.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • DOMPurify before 3.4.17 XSS via SMIL attributeName Guard Bypass in XHTML ModeSame cure53/dompurify package
  • DOMPurify before 3.4.17 DOM XSS via IN_PLACE Hook-Detached SubtreesSame cure53/dompurify package
  • Argilla Settings SettingsInfo.vue Dataset.from_disk cross site scriptingAlso CWE-79
  • Argilla Sandbox.vue cross site scriptingAlso CWE-79
  • Argilla TextField.vue cross site scriptingAlso CWE-79
  • YesWiki before 4.7.0 Reflected XSS via BazarField $_REQUEST FallbackAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 27, 2026
References
2 linked sources
Open source record