PostCSS line return parsing error

Description

An issue was discovered in PostCSS before 8.4.31. It affects linters using PostCSS to parse external Cascading Style Sheets (CSS). There may be \r discrepancies, as demonstrated by @font-face{ font:(\r/*);} in a rule.

This vulnerability affects linters using PostCSS to parse external untrusted CSS.

Recommendation

Update the postcss package to the latest compatible version. Followings are version details:

• Affected version(s): < 8.4.31
• Patched version(s): 8.4.31

References

• GHSA-7fh5-64p2-3v2j
• lists.debian.org
• CVE-2023-44270
• CWE-144
• CWE-74
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• @fastify/reply-from JSON Content-Type parsing confusion - CVE-2023-51701
• parse-server: Malformed `$regex` query leaks database error details in API response - CVE-2026-30835
• Svelte: XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers - CVE-2026-27902
• PostCSS has XSS via Unescaped </style> in its CSS Stringify Output - CVE-2026-41305

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Tags:

npm

postcss