HighVulnerabilityLLM-specific

CVE-2026-87987: Mistral Vibe arbitrary code execution via environment variable assignments

Source: NVD(opens in a new tab)
Identifier: CVE-2026-87987
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: 0.6%

Summary

CVE-2026-87987 is an arbitrary code execution vulnerability in Mistral Vibe that lets an attacker bypass command permission checks. Environment variable assignments placed before allowlisted commands are excluded from inspection, so attacker-controlled variables can trigger code execution without user approval.

Mitigation

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

Details

Scores and exploitation

EPSS: 0.6%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-15

Affected

Vendors: Mistral

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Agent
Impact: Confidentiality,
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-2026-87987

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

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

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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