# CVE-2026-116843: Mistral Vibe before 3.0.3 RCE via Git Filter Drivers in Worktree Mode

Status: published. Published: 2026-10-27. Updated: 2026-11-02.

Mistral Vibe before 3.0.3 contains a remote code execution vulnerability that allows attackers to run commands by defining git filter drivers in an untrusted repository's .git/config. When started with --worktree, git worktree add applies .gitattributes and runs filter smudge, clean, or process commands before the trusted-folder check, executing attacker commands with user privileges.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/mistralai/mistral-vibe/commit/7bb48f213ac677f943d5c791199ed3dddf302f00

## Affected products and versions

- mistralai / mistral-vibe (mistral-vibe): ≥ 0; < 3.0.3 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.43% as of 2026-11-02; percentile 37.63%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-829

## Exploit evidence

- exploit: https://github.com/mistralai/mistral-vibe/issues/997 (ADP: CISA-ADP)

## References

- https://github.com/mistralai/mistral-vibe/issues/997 (CNA: VulnCheck; issue-tracking)

- https://github.com/mistralai/mistral-vibe/commit/7bb48f213ac677f943d5c791199ed3dddf302f00 (CNA: VulnCheck; patch)

- https://github.com/mistralai/mistral-vibe/releases/tag/v3.0.3 (CNA: VulnCheck; release-notes)

- https://github.com/mistralai/mistral-vibe/blob/v2.24.1/vibe/core/worktree.py#L303-L317 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/mistral-vibe-before-3.0.3-rce-via-git-filter-drivers-in-worktree-mode (CNA: VulnCheck; third-party-advisory)

- https://github.com/mistralai/mistral-vibe/issues/997 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-116843; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-116843; retrieved 2026-11-02; source updated Not reported

Revision: 8074e8686081847397ccf692e4b5f4d367a6297350db603c336fe59ad2ecd47f

Canonical: https://y2.dev/cve/CVE-2026-116843

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