CVE Explorer

CVE-2026-34052

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a4e66ce3fde369363e37da42a714a262bcb1e4fdf73df717b842be9ef197f2b9

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-401","description":"CWE-401: Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"ltiauthenticator","vendor":"jupyterhub","versions":[{"status":"affected","version":"< 1.6.3"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-401","description":"CWE-401: Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/jupyterhub/ltiauthenticator/releases/tag/1.6.3","tags":["x_refsource_MISC"],"url":"https://github.com/jupyterhub/ltiauthenticator/releases/tag/1.6.3"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/references/1

{"name":"https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-8mxq-7xr7-2fxj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-8mxq-7xr7-2fxj"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:521af1a76cd86ba3fca97f517d66a442dd0374d348e8cc45c17f3c6d6ca4c62b · sha256:95f489f88645b410… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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