CVE-2026-79770
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 products
- Nokogiri
- CVSS 4.0
- 8.7 HIGH
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.3% (20th percentile)
- Weakness
- CWE-1333
- NVD status
- Awaiting Analysis
- Published
- 2026-08-25
CVE-2026-79770 at NVD
No indexed exploits for CVE-2026-79770 yet
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No exploit for CVE-2026-79770 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.