CVE-2026-34052
- Source
- https://cve.org/CVERecord?id=CVE-2026-34052
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34052.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-34052
- Aliases
- Downstream
CGA (8)
- Published
- 2026-04-03T22:04:10Z
- Modified
- 2026-10-21T02:56:52Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- LTI JupyterHub Authenticator: Unbounded Memory Growth via Nonce Storage (Denial of Service)
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-401", "CWE-770" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34052.json" }- References
Affected packages
Git / github.com/jupyterhub/ltiauthenticator
Affected ranges
- Type
- GIT
- Repo
- https://github.com/jupyterhub/ltiauthenticator
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "1.6.3" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "original_tag": "1.6.3", "range": [ { "fixed": "4fb95e2b72ec87c2000c5b6ea1968479c1a82382" } ], "source": "REFERENCES_TAG" }, { "cpe": "cpe:2.3:a:jupyter:lti_jupyterhub_authenticator:*:*:*:*:*:*:*:*", "range": [ { "introduced": "0" }, { "fixed": "1.6.3" } ], "source": "CPE_RANGE" } ] }