PyPI/justhtml CVE-2026-5751: medium 6.1, EPSS 0.26%

justhtml: Mutation XSS with custom foreign-namespace sanitization policies

Action: Upgrade justhtml to 1.14.0 or later.

pip install justhtml==1.14.0

Affected

Fixed versions

Sources

• osv: GHSA-r758-8hxw-4845
• nvd: CVE-2026-5751
• https://github.com/EmilStenstrom/justhtml/security/advisories/GHSA-r758-8hxw-4845
• https://github.com/EmilStenstrom/justhtml/commit/8adc4dfe31723dc522f44338f9bd98381c92b076
• https://github.com/EmilStenstrom/justhtml
• https://github.com/EmilStenstrom/justhtml/releases/tag/v1.14.0

CVE-2026-5751 · published 2026-04-08T00:06:17Z · modified 2026-08-24T03:55:59.795016825Z · JSON