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Vulnerability record · CVE-2026-61371 · published 15 July 2026

CVE-2026-61371: Link following vulnerability

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”).

7.5 CVSS 3.1 High EPSS 0.53% · top 57.5% CWE-59 · Link following Awaiting Analysis
7.5CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
15 Jul 2026Last modified by NVD

Description

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”).

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

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-61371), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.