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  4. CVE 2026 109345 dompurify before 3416 xss via inplace returned
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Back to active CVEs
Medium · CVSS 5.1CVE-2026-109345

DOMPurify before 3.4.16 XSS via IN_PLACE Returned Rawtext RootCVE-2026-109345

Answer in brief

CVE-2026-109345 records a Medium severity (CVSS 5.1) vulnerability in DOMPurify before 3.4.16 XSS via IN_PLACE Returned Rawtext Root. 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 12, 2026Updated Oct 12, 2026Source checked Oct 12, 2026First seen by HOL Oct 12, 2026Material review Oct 12, 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>=0 <3.4.163.4.16

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for cure53/DOMPurify.
  2. 2Review the reported fix. Update cure53/DOMPurify to 3.4.16 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 12, 2026

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

  2. Source modified

    Oct 12, 2026

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

  3. First seen by HOL

    Oct 12, 2026

Sources and claim methodology

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

DOMPurify before 3.4.16 contains a cross-site scripting vulnerability that allows attackers to bypass sanitization because IN_PLACE mode returns a force-removed style element whose text content still carries markup. Attackers can supply a style element containing a closing style tag and an img onerror payload, which executes script when the application serializes and re-parses the returned node.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • WordPress Quiz And Survey Master plugin <= 11.2.7 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Element Pack Elementor Addons plugin <= 8.8.8 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • WordPress Premium Addons for Elementor plugin <= 4.11.110 - Cross Site Scripting (XSS) vulnerabilityAlso CWE-79
  • Netcore NR268 Web UI l7_call_board_user_set.cgi eval cross site scriptingAlso CWE-79
  • Cross-site scripting in Progress MarkLogic ServerAlso CWE-79
  • hex_core decompresses registry and Erlang term API responses without size limitsSame generic ecosystem

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 12, 2026
References
2 linked sources
Open source record