{"id":"DEBIAN-CVE-2026-44312","details":"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 Man-in-the-Middle (MITM) attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFY_NONE, meaning any HTTPS certificate—even entirely untrusted—will be accepted without validation. This vulnerability is fixed in 2.1.0 and 1.22.0.","modified":"2026-09-14T17:03:13.472714192Z","published":"2026-05-14T17:16:22.393Z","upstream":["CVE-2026-44312"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-44312"}],"affected":[{"package":{"name":"ruby-css-parser","ecosystem":"Debian:12","purl":"pkg:deb/debian/ruby-css-parser?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.0-2+deb12u1"}]}],"versions":["1.6.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44312.json"}},{"package":{"name":"ruby-css-parser","ecosystem":"Debian:13","purl":"pkg:deb/debian/ruby-css-parser?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.0-1+deb13u1"}]}],"versions":["1.19.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44312.json"}},{"package":{"name":"ruby-css-parser","ecosystem":"Debian:14","purl":"pkg:deb/debian/ruby-css-parser?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-1"}]}],"versions":["1.19.0-1","1.21.1-1","2.0.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44312.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N"}]}