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.
History

Tue, 07 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Jupyterhub
Jupyterhub ltiauthenticator
Vendors & Products Jupyterhub
Jupyterhub ltiauthenticator

Mon, 06 Apr 2026 20:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 03 Apr 2026 22:45:00 +0000

Type Values Removed Values Added
Description 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.
Title LTI JupyterHub Authenticator: Unbounded Memory Growth via Nonce Storage (Denial of Service)
Weaknesses CWE-401
CWE-770
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-03T22:04:10.519Z

Updated: 2026-04-06T18:59:04.966Z

Reserved: 2026-03-25T15:29:04.746Z

Link: CVE-2026-34052

cve-icon Vulnrichment

Updated: 2026-04-06T18:58:56.743Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-03T23:17:03.777

Modified: 2026-04-07T13:20:55.200

Link: CVE-2026-34052

cve-icon Redhat

No data.