PT-2025-7240 · Dompurify+1 · Dompurify+1

Nsysean · Published 2025-02-14 · Updated 2025-12-23 · CVE-2025-26791

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: DOMPurify versions prior to 3.2.4

Description: The issue is related to an incorrect template literal regular expression in DOMPurify, which can lead to mutation cross-site scripting (mXSS).

Recommendations: For versions prior to 3.2.4, update to version 3.2.4 or later to resolve the issue.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2026-04945

CVE-2025-26791

GHSA-VHXF-7VQR-MRJG

OPENSUSE-SU-2025:14921-1

RHSA-2026:2769

Affected Products

Dompurify

Debian

References · 21

• 🔥 https://nsysean.github.io/posts/dompurify-323-bypass · Exploit
• 🔥 https://ensy.zip/posts/dompurify-323-bypass · Exploit
• https://github.com/cure53/DOMPurify/commit/d18ffcb554e0001748865da03ac75dd7829f0f02 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-26791 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-vhxf-7vqr-mrjg · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-26791 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-26791 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-26791 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:14921-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-26791 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-04945 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-26791 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-26791 · Vendor Advisory
• https://github.com/cure53/DOMPurify · Note
• https://github.com/cure53/DOMPurify/releases/tag/3.2.4 · Note