# CVE-2026-87984

> CVE-2026-87984. CVSS 9.3 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-87984
Last updated: 2026-09-11T17:35:21Z

- Published: 2026-09-11 14:24 UTC · Updated: 2026-09-11 17:35 UTC · Assigner: HiddenLayer
- CVSS: 9.3 (CVSS 4.0) · Severity: Critical
- EPSS: 0.50%, 42th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-22

## Description

An arbitrary file write vulnerability in Mistral Vibe, introduced in version 1.3.4, allows an attacker to create or overwrite files outside the active workspace without user approval. Shell redirection destinations are omitted from permission checks, enabling otherwise allowlisted commands to write to arbitrary paths accessible to the Vibe process.

## Affected vendors and products

- mistralai: mistral-vibe

## Tracked companies

- [Mistral AI](https://rewindex.com/company/mistral-ai.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-87984)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-87984)
- [https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe2](https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe2)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-87984 · Markdown: https://rewindex.com/cve/CVE-2026-87984.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-87984 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:04:36.819Z