{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79770","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-08-25T14:29:43.528Z","datePublished":"2026-08-25T15:16:03.059Z","dateUpdated":"2026-09-16T15:51:27.061Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-08-25T15:16:03.059Z"},"datePublic":"2026-04-27T00:00:00.000Z","title":"Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Inefficient Regular Expression Complexity","cweId":"CWE-1333","type":"CWE"}]}],"affected":[{"vendor":"sparklemotion","product":"nokogiri","defaultStatus":"unaffected","packageURL":"pkg:gem/nokogiri","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"1.19.3"},{"version":"1.19.3","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:*","versionEndExcluding":"1.19.3"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-c4rq-3m3g-8wgx)"},{"name":"VulnCheck Advisory: Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer"}],"credits":[{"lang":"en","value":"colby-swandale","type":"reporter"},{"lang":"en","value":"flavorjones","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-79770","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-08-25T16:10:25.348193Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-16T15:51:27.061Z"}}]}}