Jupyter Lti Jupyterhub Authenticator vulnerabilities

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Published CVEs affecting Jupyter Lti Jupyterhub Authenticator: 1 record(s), with affected versions and fixes.
cpe:2.3:a:jupyter:lti_jupyterhub_authenticator

CVE-2026-34052 Medium · 5.9 CWE-401 Apr 3, 2026

LTI JupyterHub Authenticator: Unbounded Memory Growth via Nonce Storage (Denial of Service)

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.