# CVE-2026-87983: Mistral Vibe arbitrary file read via quoted path bypass

Source: https://junglewise.ai/threats/cve-2026-87983-mistral-vibe-arbitrary-file-read-via-quoted-path-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-11. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-87983 · Severity: info · CVSS 9.2 · Published 2026-09-11

Mistral Vibe is an AI coding assistant that enforces workspace restrictions to prevent access to sensitive files outside an active project directory. An attacker can bypass these restrictions by wrapping absolute file paths in shell quotes (e.g., cat "/etc/bashrc"), causing the security check to pass while the shell strips the quotes and executes the real path. This allows unauthorized reading of any file accessible to the Vibe process, including credentials, API tokens, SSH keys, and source code.

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

## Quick answers

**Is CVE-2026-87983 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-87983 being exploited in the wild.

**How severe is CVE-2026-87983?** Informational severity, with a CVSS score of 9.2, published 11 September 2026.

**Which products and versions are affected?** Mistral Vibe 2.6.0 and later.

**Is there a fix for CVE-2026-87983?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-87983 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-87983?** 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.

## Technical details

This is a path traversal vulnerability (CWE-22) in Mistral Vibe's workspace restriction logic located in vibe/core/tools/builtins/bash.py. The vulnerable _extract_commands() function uses the raw text of parsed bash syntax nodes, including shell quotation marks, when reconstructing commands for the permission check. When is_path_within_workdir() evaluates a quoted path like "/etc/bashrc", it treats it as relative (since the first character is a quote, not a forward slash) and incorrectly determines it lies within the workspace. The allowlisted command (cat, head, tail, stat, wc) is approved without user interaction. However, the original bash command is executed with the quotation marks stripped by the shell, giving it access to the absolute path outside the workspace. The fix requires normalizing string nodes before path validation to work with effective shell arguments rather than raw tokens.

## Affected products

- Mistral Vibe 2.6.0 and later

## Timeline

- 2026-09-11: disclosed

## References

- [https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe](https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe)

## Related threats

- [Mistral Vibe remote code execution in repository configuration](https://junglewise.ai/threats/cve-2026-122135-mistral-vibe-before-3-0-3-contains-a-remote-code-execution)
- [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)