CVE-2026-61371

Severity CVSS v4.0:

Pending analysis

Type:

CWE-59 Link Following

Publication date:

15/07/2026

Last modified:

15/07/2026

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”).

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

7.50

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

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