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    CVE-2026-34052

    LTI JupyterHub Authenticator is a JupyterHub authenticator for LTI. Prior to version 1.6.3, the LTI 1.1 validator stores OAuth nonces in a class-level dictionary that grows without bounds. Nonces are added before signature validation, so an attacker with knowledge of a valid consumer key can send repeated requests with unique nonces to gradually exhaust server memory, causing a denial of service. This issue has been patched in version 1.6.3.

    Published:Apr 3, 2026
    Last Modified:Apr 14, 2026
    EPS:Apr 3, 2026
    EPSS Score:0.00055
    CVSS Score:5.9

    Affected Products

    Vendor
    Jupyter
    Product
    Lti Jupyterhub Authenticator
    Vendor
    Jupyterhub
    Product
    Ltiauthenticator

    Exploits

    No exploit reference

    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