{"id":"GHSA-5jhf-fpp7-v2pv","aliases":[],"url":"https://o3.security/vulnerability/GHSA-5jhf-fpp7-v2pv","summary":"Duplicate Advisory: Nokogiri CSS selector tokenizer has regular expression backtracking","details":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-c4rq-3m3g-8wgx. This link is maintained to preserve external references.\n\n## Original Description\nNokogiri 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.","published":"2026-08-25T18:31:52Z","modified":"2026-09-03T16:25:59.375990897Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"RubyGems","name":"nokogiri","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79770"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-03T16:25:59.375990897Z"}}