CVE-2026-87986 - Vulnerability Details - OpenCVE

An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using shell constructs it's parser cannot interpret. Unparsed portions are omitted from inspection, enabling embedded commands to execute on the user's system without 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.

Exploitation none

Automatable yes

Technical Impact total

Vendors	Products
Mistral	Mistral-vibe

No data.

No data.

References

Link	Providers
https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe4

History

Sun, 13 Sep 2026 19:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Mistral Mistral mistral-vibe
Vendors & Products		Mistral Mistral mistral-vibe

Fri, 11 Sep 2026 17:00:00 +0000

Type	Values Removed	Values Added
Title		Command Permission Bypass via Unparsed Shell Constructs in Mistral Vibe

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

Type	Values Removed	Values Added
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 shell constructs it's parser cannot interpret. Unparsed portions are omitted from inspection, enabling embedded commands to execute on the user's system without approval.
Weaknesses		CWE-228
References		https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe4
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'}`

MITRE

Status: PUBLISHED

Assigner: HiddenLayer

Published: 2026-09-11T14:31:20.859Z

Updated: 2026-09-11T14:57:01.512Z

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

Link: CVE-2026-87986

Vulnrichment

Updated: 2026-09-11T14:55:02.207Z

NVD

Status : Deferred

Published: 2026-09-11T15:17:07.653

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

Link: CVE-2026-87986

Redhat

No data.

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