CVE-2026-79770 — Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer
Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal and identifier tokenization. …
Published: 2026-08-25 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7