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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
mistralai mistral-vibe unaffected
Version Status Constraints
2.6.0 affected ≤ *

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe5 cve-icon cve-icon
History

Fri, 11 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Title Arbitrary Code Execution via Environment Variable Bypass in Mistral Vibe
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 11 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-15
References
Metrics cvssV4_0

{'score': 10, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: HiddenLayer

Published:

Updated: 2026-09-11T14:59:37.174Z

Reserved: 2026-09-09T19:14:18.451Z

Link: CVE-2026-87987

cve-icon Vulnrichment

Updated: 2026-09-11T14:59:30.719Z

cve-icon NVD

Status : Deferred

Published: 2026-09-11T15:17:07.793

Modified: 2026-09-11T17:35:21.440

Link: CVE-2026-87987

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-11T16:15:05Z

Weaknesses