CVE-2026-57435
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri’s CRuby native extension could leave a Ruby wrapper pointing to freed memory when replacing the value of an XML attribute. If Ruby code had already accessed an attribute child node, Nokogiri::XML::Attr#value= could free the underlying native child node while the wrapper remained reachable through the document node cache. A later use of the freed child node or a Ruby GC mark could dereference an invalid pointer, causing an invalid read and a possible segfault. This vulnerability is fixed in 1.19.4.
- Affected products
- Nokogiri
- Nokogiri
- < 1.19.4
- Fix
- Available
- CVSS 3.1
- 7.5 HIGH
- EPSS
- 0.4% (29th percentile)
- Weakness
- CWE-416, CWE-825
- NVD status
- Analyzed
- Published
- 2026-06-25
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