CVE-2026-76641
A remote anonymous attacker can exploit a vulnerability in expat to cause memory corruption and a denial-of-service condition.
CSIRTS triage
- What
- A vulnerability in expat causes memory corruption and denial of service.
- Who is affected
- Deployments using the expat XML parser library.
- Urgency
- Medium: severity rated medium; denial of service via memory corruption is significant.
- Action
- Apply security updates to expat library; check dependent projects and applications for updates.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
Advisory coverage (2)
- medium[NEW] [medium] expat: Vulnerability enables denial of servicecert-bund · 2026-08-21
- highCVE-2026-76641: Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trig…nvd · 2026-08-20
External references
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[](https://www.csirts.com/cve/CVE-2026-76641)