CVE-2026-87987

CriticalCVSS 10.0/10Last modified Sep 11, 2026

Description

An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using environment variable assignments preceding allowlisted commands. These assignments are excluded from inspection, enabling attacker-controlled environment variables to cause arbitrary code execution without user approval.

Metrics

CVSS 4.0 10.0/10CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weakness enumeration

CWE-15

Affected software

No affected versions have been published.

Timeline

Published
Sep 11, 2026
Last modified
Sep 11, 2026
NVD status
Deferred

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CVE-2026-87987: Critical severity, CVSS 10.0 | Vulnix