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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade node-postcss | Dec 30, 2024 | Sep 29, 2023 |
| Red Hat Jboss Eap | — | — | Dec 20, 2024 | Sep 29, 2023 |
| Redhat Openshift | — | Upgrade rhcos | Aug 17, 2026 | Sep 29, 2023 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Sep 29, 2023 |
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