Vulnerability-Lookup

CVE-2026-87987 (GCVE-0-2026-87987)

Vulnerability from cvelistv5 – Published: 2026-09-11 14:34 – Updated: 2026-09-11 14:59

Summary

An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using environment variable assignments preceding allowlisted commands. These assignments are excluded from inspection, enabling attacker-controlled environment variables to cause arbitrary code execution without user approval.

Severity

10 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-11 14:59 UTC

CWE

CWE-15 - External control of system or configuration setting

Assigner

HiddenLayer mitre root

References

1 reference

URL	Tags
https://www.hiddenlayer.com/sai-security-advisory…

Impacted products

1 product

Vendor	Product	Version	CPE status
mistralai	mistral-vibe	Affected: 2.6.0 , ≤ * (semver)	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-87987

Vulnerability from fkie_nvd - Published: 2026-09-11 15:17 - Updated: 2026-09-11 17:35

Severity

10.0 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Summary

References

	URL	Tags
	6f8de1f0-f67e-45a6-b68f-98777fdb759c	https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe5

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "mistral-vibe",
          "repo": "https://github.com/mistralai/mistral-vibe",
          "vendor": "mistralai",
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              "status": "affected",
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          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
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          "baseScore": 10.0,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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GHSA-R6R3-X5P3-G7M8

Vulnerability from github – Published: 2026-09-11 15:32 – Updated: 2026-09-11 15:32

Details

Severity

10.0 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Show details on source website

JSON

To clipboard

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  "affected": [],
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    "CVE-2026-87987"
  ],
  "database_specific": {
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      "CWE-15"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
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    "severity": "CRITICAL"
  },
  "details": "An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using environment variable assignments preceding allowlisted commands. These assignments are excluded from inspection, enabling attacker-controlled environment variables to cause arbitrary code execution without user approval.",
  "id": "GHSA-r6r3-x5p3-g7m8",
  "modified": "2026-09-11T15:32:42Z",
  "published": "2026-09-11T15:32:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87987"
    },
    {
      "type": "WEB",
      "url": "https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-87987 (GCVE-0-2026-87987)

FKIE_CVE-2026-87987

GHSA-R6R3-X5P3-G7M8

Tags

Sightings

Nomenclature