CVE-2026-67623 Mistral Vibe < 2.23.3 Arbitrary Command Execution via git fsmonitor Hook
Attackers can execute arbitrary commands with victim privileges by crafting a repository with a malicious git fsmonitor hook triggered by Mistral Vibe.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-67623?
CVE-2026-67623 is a high-severity command injection vulnerability in mistralai mistral-vibe, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Mistral Vibe before 2.23.3 contains a remote code execution vulnerability that allows attackers to execute arbitrary commands by embedding a malicious core.fsmonitor hook in a repository's .git/config file, which is triggered when vibe invokes git status --porcelain without suppressing hook execution. Attackers can distribute or create a crafted repository containing a malicious fsmonitor entry to achieve arbitrary command execution with the victim's full privileges when any vibe command is run inside that repository.
Weakness: CWE-829
Which versions are affected by CVE-2026-67623?
How do I fix CVE-2026-67623?
No fix has been published for CVE-2026-67623 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-67623 being exploited?
There is no known exploitation of CVE-2026-67623 in the wild and no public exploit code.
Sources
Also known as GHSA-g6fr-w8c4-4935.