This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-79770 →

DEBIAN-CVE-2026-79770

Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal an...

Original description

The description as published by the source.

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: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 ruby-nokogiri

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 ruby-nokogiri

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 ruby-nokogiri

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.19.3+dfsg-1"}]}]

References

advisory security-tracker.debian.org