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Vulnerabilities

Vulnerability · CVE-2026-41238

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG.

Published Apr 23, 2026 · catalog updated Jun 17, 2026 · DOMPurify is a DOM-only

Check if you run it

No confirmed exploitation is on record for CVE-2026-41238. EPSS is 0.35%. Act only if a listed version of DOMPurify is a DOM-only is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (DOMPurify is a DOM-only).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.35%
Remediation
Advisory link
Affected products
See sources for product scope

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses with the default configuration (no option), a prior prototype pollution gadget can inject permissive and regex values into , causing DOMPurify to allow arbitrary custom elements with arbitrary attributes — including event handlers — through sanitization. Version 3.4.0 fixes the issue.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-41238

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-41238. EPSS is 0.35%. Act only if a listed version of DOMPurify is a DOM-only is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution); CWE-79: Cross-site Scripting (XSS). EPSS 0.35%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 23, 2026 · NIST NVD

    Detected

    DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses with the default configuration (no option), a prior prototype pollution gadget can inject permissive and regex values into , causing DOMPurify to allow arbitrary custom elements with arbitrary attributes —

  2. Jun 17, 2026 · NIST NVD

    Updated

    DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses with the default configuration (no option), a prior prototype pollution gadget can inject permissive and regex values into , causing DOMPurify to allow arbitrary custom elements with arbitrary attributes —

Sources

  • CVE.orgVulnerability recordCVE-2026-41238

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-41238

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-41238

    DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses with the default configuration (no op

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.