by Kastro
Paper/Archive/CVE-2026-87986

CVE-2026-87986

mistralai mistral-vibe — An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using shell constructs i…

EPSS 0.6%CVSS 10.0
critical.is priorityof 100
39
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 46.9.469 × 209.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
mistral-vibe1.3.4 – *–CNA

Scores by source

HiddenLayer (CNA)10.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refhiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe4