HIGH 8.7 NVD
CVE-2026-79770
Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal and identifi
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.
References
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
- https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-08-25 via NVD.
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