VULNERABILITY INTELLIGENCE

CVE-2026-79770

CVSS score8.7 HIGH
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-08-25
Last modified2026-09-01
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Description

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.

Weakness classification

  • CWE-1333: Inefficient Regular Expression Complexity

Primary references