CVE-2026-87984 Path traversal in mistral-vibe
Attackers can write arbitrary files outside the workspace by exploiting missing permission checks on shell redirections in Mistral Vibe.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-87984?
CVE-2026-87984 is a critical path traversal vulnerability in mistralai mistral-vibe, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-87984?
How do I fix CVE-2026-87984?
Apply the vendor's patch.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-87984 being exploited?
There is no known exploitation of CVE-2026-87984 in the wild and no public exploit code.
Sources
Also known as GHSA-4vx3-rfqx-v945.