CVE-2026-56410
CSIRTS triage
- What
- An integer overflow vulnerability exists in xmlwf's resolveSystemId function in libexpat.
- Who is affected
- Deployments of libexpat before version 2.8.2.
- Urgency
- Remediation is medium urgency due to the potential for exploitation, with a CVSS score of 6.9.
- Action
- Upgrade to libexpat version 2.8.2 or later.
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Exploitation outlook
- Low exploitation risk0.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Advisory coverage (1)
- mediumCVE-2026-56410: xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.msrc · 2026-06-09
External references
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