# CVE-2026-87987

## Summary

- **CVE ID:** CVE-2026-87987
- **Severity:** CRITICAL
- **CVSS Score:** 10 (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)
- **CWE:** CWE-15
- **Published:** Sep 11, 2026
- **Last 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.

## Affected Products

- mistralai — mistral-vibe (2.6.0)

## References

- [CNA](https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe5)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.33%
- **EPSS Percentile:** 26.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._