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NVD Vulnerability Details :
CVE-2026-34052
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-03 Apr, 2026 | 23:17
Updated At-13 Apr, 2026 | 17:44

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.9MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 3.1
Base score: 5.9
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE Matches
jupyter
jupyter
>>lti_jupyterhub_authenticator>>Versions before 1.6.3(exclusive)
cpe:2.3:a:jupyter:lti_jupyterhub_authenticator:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-401Primarysecurity-advisories@github.com
CWE-770Primarysecurity-advisories@github.com
CWE ID: CWE-401
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-770
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/jupyterhub/ltiauthenticator/releases/tag/1.6.3security-advisories@github.com
Product
https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-8mxq-7xr7-2fxjsecurity-advisories@github.com
Vendor Advisory
Hyperlink: https://github.com/jupyterhub/ltiauthenticator/releases/tag/1.6.3
Source: security-advisories@github.com
Resource:
Product
Hyperlink: https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-8mxq-7xr7-2fxj
Source: security-advisories@github.com
Resource:
Vendor Advisory
Change History
0Changes found
Details not found