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CVE-2025-26791: DOMPurify allows Cross-site Scripting (XSS)

February 14, 2025

DOMPurify before 3.2.4 has an incorrect template literal regular expression, sometimes leading to mutation cross-site scripting (mXSS).

References

  • ensy.zip/posts/dompurify-323-bypass
  • github.com/advisories/GHSA-vhxf-7vqr-mrjg
  • github.com/cure53/DOMPurify
  • github.com/cure53/DOMPurify/commit/d18ffcb554e0001748865da03ac75dd7829f0f02
  • github.com/cure53/DOMPurify/releases/tag/3.2.4
  • nsysean.github.io/posts/dompurify-323-bypass
  • nvd.nist.gov/vuln/detail/CVE-2025-26791

Code Behaviors & Features

Detect and mitigate CVE-2025-26791 with GitLab Dependency Scanning

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Affected versions

All versions before 3.2.4

Fixed versions

  • 3.2.4

Solution

Upgrade to version 3.2.4 or above.

Impact 4.5 MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

npm/dompurify/CVE-2025-26791.yml

Spotted a mistake? Edit the file on GitLab.

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