What’s Vulnerable › Vulnerabilities

CVE-2025-26791

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-02-14 · updated 2026-06-17
• Weakness: CWE-79

Description

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

Affected products

• cure53 DOMPurify: before 3.2.4 — fixed in 3.2.4

How to fix

Upgrade to a fixed version: cure53 DOMPurify 3.2.4. Check the vendor advisory for mitigations.

References

• https://ensy.zip/posts/dompurify-323-bypass/
• https://github.com/cure53/DOMPurify/commit/d18ffcb554e0001748865da03ac75dd7829f0f02
• https://github.com/cure53/DOMPurify/releases/tag/3.2.4
• https://nsysean.github.io/posts/dompurify-323-bypass/
• https://ensy.zip/posts/dompurify-323-bypass/

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