CVE-2026-56131
A local attacker can exploit multiple vulnerabilities in expat to conduct a denial of service attack or potentially execute code.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited by a local attacker to conduct a denial of service attack or potentially execute code.
- Who is affected
- Deployments of expat are affected.
- Urgency
- Remediation is medium urgency as exploitation is possible but not currently active.
- Action
- Update to the latest version of expat.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (2)
- medium[UPDATE] [medium] expat: Multiple vulnerabilitiescert-bund · 2026-07-08
- mediumCVE-2026-56131: libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_ResumeParser from wit…msrc · 2026-06-09
External references
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[](https://www.csirts.com/cve/CVE-2026-56131)