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 `</style>` sequences when stringifying CSS ASTs. When user-submitted CSS is parsed and re-stringified for embedding in HTML `<style>` tags, `</style>` in CSS values breaks out of the style context, enabling XSS. Version 8.5.10 fixes the issue.

INFO

Published Date :

2026-04-24T02:27:47.719Z

Last Modified :

2026-04-24T16:23:41.198Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-41305 vulnerability.

No data.

REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-41305.

URL Resource
https://github.com/postcss/postcss/releases/tag/8.5.10 cve-icon cve-icon
https://github.com/postcss/postcss/security/advisories/GHSA-qx2v-qp2m-jg93 cve-icon cve-icon cve-icon
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CVSS Vulnerability Scoring System

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