CVE-2026-87984
Critical
Description
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.
SeverityCritical
CVSS9.3
Exploit probability—
ProductMistralai Mistral-vibe
PublishedSep 11, 2026
First seenSep 11, 2026
Weakness typeCWE-22Path traversal
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mistralai mistral-vibe | 1.3.4 | — |
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