๐Ÿ›ก๏ธ CVE-2026-41305
๐ŸŸก CVSS 6.1 โ€” Medium โœ… No Known Exploit CWE-79 NVD
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Versions prior to 8.5.10 do not escape `` sequences when stringifying CSS ASTs. When user-submitted CSS is parsed and re-stringified for embedding in HTML `` tags, `` in CSS values breaks out of the style context, enabling XSS. Version 8.5.10 fixes the issue.

Details

Severity Medium
CVSS Score 6.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE CWE-79
Public Exploit โœ… No
Source NVD
Published 2026-04-24
Updated 2026-06-02
Modified 2026-05-06
Fix URL N/A

Affected Packages

Software From version Fixed in
postcss โ€” โ€”
unknown โ€” โ€”

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