Vulnerability Description
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPathContext outlived its document and the document was collected, evaluating an XPath expression could read invalid memory and potentially segfault. This is only reachable when application code constructs an XPathContext directly and lets the document become unreachable while continuing to use the context. The normal Document#xpath, #css, and related search methods are not affected, and it is not triggerable by malicious document input. This vulnerability is fixed in 1.19.4.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nokogiri | Nokogiri | < 1.19.4 |
Related Weaknesses (CWE)
References
- https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-p67v-3w7g-wjgMitigationVendor Advisory
FAQ
What is CVE-2026-57437?
CVE-2026-57437 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::XPathContext did not keep its source document alive for garbage collection. If an XPa...
How severe is CVE-2026-57437?
CVE-2026-57437 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-57437?
Check the references section above for vendor advisories and patch information. Affected products include: Nokogiri Nokogiri.