CVE-2026-76957
A local attacker can exploit a vulnerability in expat to perform an unspecified attack.
CSIRTS triage
- What
- A vulnerability in expat allows an unspecified attack vector.
- Who is affected
- Deployments using the expat library, particularly on local systems.
- Urgency
- Medium priority as exploitation requires local access and attack vector is unspecified.
- Action
- Check for and apply available security patches for expat CVE-2026-76957.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.10% 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 (3)
- medium[NEW] [medium] expat: Vulnerability allows unspecified attackcert-bund · 2026-08-20
- mediumCVE-2026-76957: libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, …nvd · 2026-08-20
- mediumCVE-2026-76957: libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, …msrc · 2026-08-11
External references
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[](https://www.csirts.com/cve/CVE-2026-76957)