HighVulnerabilityLLM-specific

CVE-2026-87984: Mistral Vibe arbitrary file write through shell redirection

Source: NVD(opens in a new tab)
Identifier: CVE-2026-87984
Published: September 11, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.5%

Summary

An arbitrary file write vulnerability in Mistral Vibe, introduced in version 1.3.4, lets an attacker create or overwrite files outside the active workspace without user approval. Shell redirection destinations are left out of permission checks, so otherwise allowlisted commands can write to any path the Vibe process can access.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

EPSS: 0.5%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.
Disclosure date: September 11, 2026

Weaknesses and techniques

Weakness (CWE): CWE-22
Attack pattern (CAPEC): CAPEC-126

Affected

Vendors: Mistral

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Agent
Impact: Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-87984

First tracked: September 11, 2026 at 02:08 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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