css_parser (RubyGems) — known CVEs & security advisories

Known CVE vulnerabilities and GitHub Security Advisories affecting the RubyGems package css_parser, with affected version ranges, CVSS severity, EPSS exploit prediction, and CISA KEV status.

CVEs (1)

• CVE-2026-44312 — CVSS 5.8 (medium): css_parser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a…