CVE-2026-34052

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

5.9 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

April 03, 2026

Last Modified

April 07, 2026

CWE ID

CWE-401

Source

GitHub

Vendor

pip

Product

jupyterhub-ltiauthenticator

External References

https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-8mxq-7xr7-2fxj
https://github.com/advisories/GHSA-8mxq-7xr7-2fxj

CVE-2026-34052

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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