CVE-2026-57436
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Document#root= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage collection or finalization, leading to an invalid memory read or potentially a segfault. This vulnerability is fixed in 1.19.4.
- Affected products
- Nokogiri
- Nokogiri
- < 1.19.4
- Fix
- Available
- CVSS 4.0
- 6.3 MEDIUM
- CVSS 3.1
- 5.3 MEDIUM
- EPSS
- 0.3% (25th percentile)
- Weakness
- CWE-416
- NVD status
- Analyzed
- Published
- 2026-06-25
CVE-2026-57436 at NVD
No indexed exploits for CVE-2026-57436 yet
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No exploit for CVE-2026-57436 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.