CVE-2026-79770

Name
CVE-2026-79770
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
disclosure@vulncheck.com https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx
disclosure@vulncheck.com https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:ruby:*:* ruby-nokogiri >= None < 1.19.3

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
ruby-nokogiri edge-community 1.19.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.19.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.18.8-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.18.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.16.7-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.13.10-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.13.6-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.13.4-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.11.6-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
ruby-nokogiri edge-community 1.10.4-r0 None possibly vulnerable
ruby-nokogiri 3.24-community 1.19.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable