CVE-2026-61371

HIGH

Microsoft AVML < 0.17.0 - Arbitrary File Truncation via Symlink Following in Output Path

Title source: llm
STIX 2.1

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”).

References (3)

Core 3

Scores

CVSS v3 7.5
EPSS 0.0036
EPSS Percentile 28.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-59
Status published
Published Jul 15, 2026
Tracked Since Jul 15, 2026