CVE-2026-61371

7.5 highEPSS 0.5%

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”).

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWE: CWE-59
Published: 2026-07-15
Modified: 2026-07-15
Record from: the NVD, synced 2026-10-19

References

https://gist.github.com/thesmartshadow/2d099071f847de8db3dc4bbaf4dfa6df
https://github.com/microsoft/avml/pull/754
https://github.com/microsoft/avml/releases/tag/v0.17.0
https://gist.github.com/thesmartshadow/2d099071f847de8db3dc4bbaf4dfa6df

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