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    CVE-2026-87984

    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.

    Published:Sep 11, 2026
    Last Modified:Sep 13, 2026
    EPS:Sep 11, 2026
    EPSS Score:0.00428
    CVSS Score:9.3

    Affected Products

    Vendor
    Mistral
    Product
    Mistral-vibe

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-109429 (CVSS 8.7) — Mistral Vibe before 2.25.4 contains a command permission gate bypass vulnerability that allows attackers to ex…
    CVE-2026-109428 (CVSS 8.7) — Mistral Vibe before 2.25.5 contains a permission validation bypass vulnerability that allows attackers to exec…
    CVE-2026-93993 (CVSS 8.6) — Mistral Vibe before 2.25.5 contains a remote code execution vulnerability in the worktree creation process tha…
    CVE-2026-87988 (CVSS 10) — An arbitrary file access vulnerability in Mistral Vibe allows an attacker to bypass workspace restrictions thr…
    CVE-2026-87987 (CVSS 10) — An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission chec…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High