Known CVE vulnerabilities and GitHub Security Advisories affecting the npm package postcss, with affected version ranges, CVSS severity, EPSS exploit prediction, and CISA KEV status.
CVEs (4)
CVE-2026-41305 — CVSS 6.1 (medium): PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree…
CVE-2021-23368 — CVSS 5.3 (medium): The package postcss from 7.0.0 and before 8.2.10 are vulnerable to Regular Expression Denial of Service (ReDoS) during source map parsing.
CVE-2021-23382 — CVSS 5.3 (medium): The package postcss before 8.2.13 are vulnerable to Regular Expression Denial of Service (ReDoS) via getAnnotationURL() and…
CVE-2023-44270 — CVSS 5.3 (medium): An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An…