{"schema":"threatline.record/2","record":{"id":"CVE-2026-108752","aliases":[],"summary":"JupyterHub through 6.0.1 OAuth Client ID Collision via Unescaped Hyphen","details":"JupyterHub through 6.0.1 contains an identifier collision vulnerability that allows authenticated users to overwrite another user's named-server OAuth client by registering a hyphenated username. Attackers holding a name like alice-prod can overwrite the client for alice's server prod, breaking OAuth login and revoking tokens by stopping their own server.","categories":["Unclassified"],"product":"jupyterhub","vendor":"jupyterhub","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-108752","source_modified_at":"2026-10-13T17:00:17.356Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"jupyterhub","vendor":"jupyterhub","versions":[{"version":"0","lessThanOrEqual":"6.0.1","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":2.3,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00245,"percentile":0.14867,"score_date":"2026-10-23"},"published_at":"2026-10-11T12:19:51.996Z","modified_at":"2026-10-13T17:00:17.356Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-108752","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T17:00:17.356Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-108752","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://hackmd.io/@haind/jupyterhub-oauth-client-id-cross-user-collision","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L563-L567","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/oauth/provider.py#L719-L754","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/jupyterhub/jupyterhub/blob/3e516c6f382b481e815ec455befb2f14d80d337b/jupyterhub/user.py#L1174-L1186","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/jupyterhub/jupyterhub","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/jupyterhub-through-6.0.1-oauth-client-id-collision-via-unescaped-hyphen","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-13T15:49:31.629227Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T17:00:17.356Z","content_hash":"c1ba07227d340c96f35b06b47c83067c9d5699e7f7f60b4c8c111eb3d8d83396"}}