{"id":"DEBIAN-CVE-2026-79770","details":"Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal and identifier tokenization. Attackers can inject adversarial CSS selectors into methods like Node#css, Node#at_css, and Searchable#search to cause exponential regex backtracking and denial of service.","modified":"2026-09-14T17:03:35.504671897Z","published":"2026-08-25T16:17:28.460Z","upstream":["CVE-2026-79770"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-79770"}],"affected":[{"package":{"name":"ruby-nokogiri","ecosystem":"Debian:12","purl":"pkg:deb/debian/ruby-nokogiri?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.13.10+dfsg-2","1.14.2+dfsg-1","1.14.3+dfsg-1","1.14.3+dfsg-2","1.15.4+dfsg-1","1.16.0+dfsg-1","1.16.0+dfsg-2","1.16.2+dfsg-1","1.16.4+dfsg-1","1.17.2+dfsg-1~exp1","1.18.10+dfsg-1","1.18.10+dfsg-2","1.18.10+dfsg-3","1.18.2+dfsg-1","1.19.1+dfsg-1","1.19.3+dfsg-1","1.19.4+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79770.json"}},{"package":{"name":"ruby-nokogiri","ecosystem":"Debian:13","purl":"pkg:deb/debian/ruby-nokogiri?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.18.10+dfsg-1","1.18.10+dfsg-2","1.18.10+dfsg-3","1.18.2+dfsg-1","1.19.1+dfsg-1","1.19.3+dfsg-1","1.19.4+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79770.json"}},{"package":{"name":"ruby-nokogiri","ecosystem":"Debian:14","purl":"pkg:deb/debian/ruby-nokogiri?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3+dfsg-1"}]}],"versions":["1.18.10+dfsg-1","1.18.10+dfsg-2","1.18.10+dfsg-3","1.18.2+dfsg-1","1.19.1+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79770.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}