Medium severity5.9NVD Advisory· Published Apr 3, 2026· Updated Apr 13, 2026
CVE-2026-34052
CVE-2026-34052
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
jupyterhub-ltiauthenticatorPyPI | < 1.6.3 | 1.6.3 |
Affected products
10- cpe:2.3:a:jupyter:lti_jupyterhub_authenticator:*:*:*:*:*:*:*:*Range: <1.6.3
- osv-coords9 versionspkg:apk/chainguard/py3.10-jupyterhub-ltiauthenticatorpkg:apk/chainguard/py3.11-jupyterhub-ltiauthenticatorpkg:apk/chainguard/py3.12-jupyterhub-ltiauthenticatorpkg:apk/chainguard/py3.13-jupyterhub-ltiauthenticatorpkg:apk/wolfi/py3.10-jupyterhub-ltiauthenticatorpkg:apk/wolfi/py3.11-jupyterhub-ltiauthenticatorpkg:apk/wolfi/py3.12-jupyterhub-ltiauthenticatorpkg:apk/wolfi/py3.13-jupyterhub-ltiauthenticatorpkg:pypi/jupyterhub-ltiauthenticator
< 1.6.3-r0+ 8 more
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3-r0
- (no CPE)range: < 1.6.3
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-8mxq-7xr7-2fxjghsaADVISORY
- github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-8mxq-7xr7-2fxjnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-34052ghsaADVISORY
- github.com/jupyterhub/ltiauthenticator/releases/tag/1.6.3nvdProductWEB
News mentions
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