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Vulnerability record · CVE-2026-87987 · published 11 September 2026

CVE-2026-87987: An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission chec…

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.

10.0 CVSS 4.0 Critical EPSS 0.56% · top 55.4% CWE-15 · CWE-15 Deferred
10.0CVSS 4.0 base score
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
11 Sep 2026Last modified by NVD

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.

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/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:

References

LinkTags
https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe5

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Source: NIST National Vulnerability Database (record CVE-2026-87987), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.