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    CVE-2026-34371

    LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the execute_code sandbox when persisting code-generated artifacts. On deployments using the default local file strategy, a malicious artifact filename containing traversal sequences (for example, ../../../../../app/client/dist/poc.txt) is concatenated into the server-side destination path and written with fs.writeFileSync() without sanitization. This gives any user who can trigger execute_code an arbitrary file write primitive as the LibreChat server user. This vulnerability is fixed in 0.8.4.

    Published:Apr 7, 2026
    Last Modified:Apr 15, 2026
    EPS:Apr 7, 2026
    EPSS Score:0.00043
    CVSS Score:6.3

    Affected Products

    Vendor
    Danny-avila
    Product
    Libre Chat
    Vendor
    Librechat
    Product
    Librechat

    Exploits

    https://github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-r67f-6692https://github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-r67f-6692

    Related CVEs

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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