CVE-2026-57434: Nokogiri: Null Pointer Dereference calling methods on uninitialized wrapper classes
CSIRTS triage
- What
- This vulnerability involves a null pointer dereference when calling methods on uninitialized wrapper classes.
- Who is affected
- Deployments using Nokogiri library.
- Urgency
- Remediation is urgent due to the high severity rating.
- Action
- Update to the latest version of Nokogiri to fix this issue.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57434
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-574340.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-57434 | coverage & exploitation status | NVD · CVE.org |