Recently modified vulnerabilities for "jupyter lti jupyterhub authenticator"

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Versions

1.3.0

pip/jupyterhub-ltiauthenticatorLTI JupyterHub Authenticator: Unbounded Memory Growth via Nonce Storage (Denial of Service)

Risk 35

Severity

5.9

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

Summary

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.

Patches

- upgrade jupyterhub-litauthenticator to 1.6.3

1 / 2

Source: GitHub

First published (updated )

CVE-2026-34052

pip/jupyterhub-ltiauthenticatorJupyterHub's LTI13Authenticator: JWT signature not validated

Risk 87

Severity

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Impact

Only users that has configured a JupyterHub installation to use the authenticator class LTI13Authenticator are influenced.

LTI13Authenticator that was introduced in jupyterhub-ltiauthenticator 1.3.0 wasn't validating JWT signatures. This is believed to allow the LTI13Authenticator to authorize a forged request granting access to existing and new user identities.

Patches

None.

Workarounds

None.

References

- This code segment didn't validate a JWT signature.

1 / 2

Source: GitHub

First published (updated )

CVE-2023-25574

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