# CVE-2026-122135: Mistral Vibe remote code execution in repository configuration

Source: https://junglewise.ai/threats/cve-2026-122135-mistral-vibe-before-3-0-3-contains-a-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-04. Updated: 2026-11-04  
License: CC BY 4.0 with a link back

CVE-2026-122135 · Severity: high · CVSS 8.8 · Published 2026-11-04

Mistral Vibe is a minimal CLI coding agent that automatically collects repository metadata during startup. Before version 3.0.3, it executes arbitrary programs specified in a repository's Git configuration without user consent, allowing an attacker who controls the repository to run code as the user running Vibe. This could lead to credential theft, data exfiltration, or further system compromise.

Technologies: [Mistral Vibe](https://junglewise.ai/threats/technologies/vibe). Vendors: [Mistral](https://junglewise.ai/threats/vendors/mistral).

## Quick answers

**Is CVE-2026-122135 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-122135 being exploited in the wild.

**How severe is CVE-2026-122135?** High severity, with a CVSS score of 8.8, published 4 November 2026.

**Which products and versions are affected?** Mistral Vibe before 3.0.3.

**Is there a fix for CVE-2026-122135?** Yes: fixed in 3.0.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-122135 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-122135?** Check whether you run Mistral Vibe at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.0.3

## Technical details

The vulnerability exists in Mistral Vibe's project context collection, which runs Git commands including `git log` with configuration settings loaded from the repository. An attacker can set the `gpg.program` and `log.showSignature` Git configuration options in a malicious repository to cause Git to execute an arbitrary program during context startup, before any user interaction or trust prompt. The attack requires the victim to open a repository they do not fully control or trust.

## Affected products

- Mistral Vibe before 3.0.3

## Timeline

- 2026-11-04: disclosed

## References

- [https://github.com/mistralai/mistral-vibe](https://github.com/mistralai/mistral-vibe)
- [https://github.com/mistralai/mistral-vibe/blob/v3.0.2/vibe/core/system_prompt.py](https://github.com/mistralai/mistral-vibe/blob/v3.0.2/vibe/core/system_prompt.py)

## Related threats

- [Mistral Vibe remote code execution via malicious Git filters](https://junglewise.ai/threats/cve-2026-122134-mistral-vibe-before-2-25-7-contains-a-remote-code-execution)
- [Mistral Vibe untrusted search path code execution on Windows](https://junglewise.ai/threats/cve-2026-122133-mistral-vibe-before-2-25-5-on-windows-contains-an-untrusted)
- [Mistral Vibe remote code execution in git worktree handling](https://junglewise.ai/threats/cve-2026-116843-mistral-vibe-before-3-0-3-contains-a-remote-code-execution)
- [Mistral Vibe command permission gate bypass in bash parsing](https://junglewise.ai/threats/cve-2026-109429-mistral-vibe-before-2-25-4-contains-a-command-permission-gate)
- [Mistral Vibe remote code execution in worktree creation](https://junglewise.ai/threats/cve-2026-93993-mistral-vibe-before-2-25-5-contains-a-remote-code-execution)