CVE-2026-34052
5.9 · MEDIUMOverview
CVE-2026-34052 is a medium-severity vulnerability affecting jupyter lti_jupyterhub_authenticator. It was published on April 3, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from jupyter. Update lti_jupyterhub_authenticator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| jupyter | lti_jupyterhub_authenticator | >= 0, < 1.6.3 | Affected |
Frequently Asked Questions
What is CVE-2026-34052?
CVE-2026-34052 is a medium-severity vulnerability affecting jupyter lti_jupyterhub_authenticator. It was published on April 3, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2026-34052?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-34052?
Check the references section for vendor advisories and patches from jupyter. Update lti_jupyterhub_authenticator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-34052?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-34052 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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