CVE-2026-57234: Nokogiri: XML::Schema on JRuby allows network requests when NONET is set, bypassing CVE-2020-26247
CSIRTS triage
- What
- This vulnerability allows network requests when NONET is set, bypassing a previous CVE.
- Who is affected
- Deployments using Nokogiri on JRuby are affected.
- Urgency
- Remediation is low urgency due to the low severity rating.
- Action
- Update Nokogiri to the latest version.
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-2026-57234
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-2026-572340.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-57234 | coverage & exploitation status | NVD · CVE.org |