CVE-2026-87987 Details
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.
A vulnerability in Mistral Vibe versions starting from 2.6.0 allows arbitrary code execution by exploiting environment variable assignments that precede allowlisted commands. The application fails to consider these variable assignments during permission checks, enabling attacker-controlled variables to manipulate command behavior in a way that executes arbitrary code without user approval. This issue is particularly dangerous when allowlisted utilities like Git are involved, as the environment variables can be used to execute malicious commands under the guise of approved actions.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 11, 2026CISA-ADP
Assessed Sep 11, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe5 | HiddenLayer | AdvisoryBundleExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-15 | External Control of System or Configuration Setting | HiddenLayer |
Affected Products
| Product | Versions |
|---|---|
| Mistral Vibe | >= 2.6.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 11, 2026 | New CVE Received | HiddenLayer |
| Sep 11, 2026 | CVE Modified | CISA-ADP |