CVE-2026-57438
CSIRTS triage
- What
- This vulnerability may lead to a use-after-free condition during XInclude processing.
- Who is affected
- Deployments using Nokogiri are affected.
- Urgency
- Remediation is medium urgency due to a severity rating of 6.6.
- Action
- Update to the patched version of Nokogiri.
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Exploitation outlook
- Low exploitation risk0.09% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.
Advisory coverage (1)
- mediumCVE-2026-57438: Nokogiri: Possible Use-After-Free in XInclude Processingmsrc · 2026-06-09
External references
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[](https://www.csirts.com/cve/CVE-2026-57438)