CVE-2023-44270

An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being included in a comment.

• CWE-74

• https://github.com/github/advisory-database/issues/2820Issue Tracking
• https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25Issue Tracking
• https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5Patch
• https://github.com/postcss/postcss/releases/tag/8.4.31Patch, Release Notes
• https://github.com/github/advisory-database/issues/2820Issue Tracking
• https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25Issue Tracking
• https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5Patch
• https://github.com/postcss/postcss/releases/tag/8.4.31Patch, Release Notes
• https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html

Published

Sep 29, 2023

Last Modified

Jun 17, 2026

Status

Modified

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