GHSA-5jhf-fpp7-v2pv

Duplicate Advisory: Nokogiri CSS selector tokenizer has regular expression backtracking

Published

2026-08-25

Modified

2026-09-02

Sources

github-advisory

Summary

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-c4rq-3m3g-8wgx. This link is maintained to preserve external references. ## Original 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.

Affected packages

Remediation: No patched version is listed by GitHub.

References

• https://github.com/advisories/GHSA-5jhf-fpp7-v2pv