CVE-2026-87984

critical · 9.3

An arbitrary file write vulnerability in Mistral Vibe, introduced in version 1.3.4, allows an attacker to create or overwrite files outside the active workspace without user approval. Shell redirection destinations are omitted from permission checks, enabling otherwise allowlisted commands to write to arbitrary paths accessible to the Vibe process.

9.3

CVSS

0.5%

EPSS (exploit prob.)

42nd

EPSS percentile

2026-09-11

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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:X/V:X/RE:X/U:X

Weaknesses

CWE-22

References

https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe2

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-87984