CVE-2024-48910: DOMPurify vulnerable to tampering by prototype polution

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-31 · updated 2026-06-17
Weakness: CWE-1321

Description

DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify was vulnerable to prototype pollution. This vulnerability is fixed in 2.4.2.

Affected products

cure53 DOMPurify: before 2.4.2 — fixed in 2.4.2

How to fix

Upgrade to a fixed version: cure53 DOMPurify 2.4.2. Check the vendor advisory for mitigations.

References

https://github.com/cure53/DOMPurify/commit/d1dd0374caef2b4c56c3bd09fe1988c3479166dc
https://github.com/cure53/DOMPurify/security/advisories/GHSA-p3vf-v8qc-cwcr
https://lists.debian.org/debian-lts-announce/2025/02/msg00010.html

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