CVE-2026-87986

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-87986
StatePUBLISHED
AssignerHiddenLayer
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 15:17:07 UTC
Updated2026-09-11 17:35:21 UTC
DescriptionAn arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using shell constructs it's parser cannot interpret. Unparsed portions are omitted from inspection, enabling embedded commands to execute on the user's system without approval.

Risk And Classification

Primary CVSS: v4.0 10 CRITICAL from 6f8de1f0-f67e-45a6-b68f-98777fdb759c

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

Problem Types: CWE-228 | CWE-228 CWE-228: Improper Handling of Syntactically Invalid Structure

VersionSourceTypeScoreSeverityVector
4.06f8de1f0-f67e-45a6-b68f-98777fdb759cSecondary10CRITICALCVSS: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/C...
4.0CNACVSS10CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
High
Sub Integrity
High
Sub Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mistralai Mistral-vibe affected 1.3.4 * semver Not specified

References

ReferenceSourceLinkTags
www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe4 6f8de1f0-f67e-45a6-b68f-98777fdb759c www.hiddenlayer.com
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