CVE-2026-61371

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Microsoft AVML before 0.17.0 could follow a symlink when opening a destination output path on Unix, allowing truncation/overwrite of the symlink target. The destructive effect is performed at open-time via O_TRUNC, and can happen before full input validation completes (“truncation-before-validation”).

Published 2026-07-15. Last modified 2026-07-15.