{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49272","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-28T20:07:58.860Z","datePublished":"2026-11-05T20:58:00.517Z","dateUpdated":"2026-11-05T21:14:43.982Z"},"containers":{"cna":{"title":"OAuthLib: Bearer token can be retrieved as long as client knows a valid client ID for device workflow","problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/oauthlib/oauthlib/security/advisories/GHSA-3jp2-3mrg-2vxc","tags":["x_refsource_CONFIRM"],"url":"https://github.com/oauthlib/oauthlib/security/advisories/GHSA-3jp2-3mrg-2vxc"},{"name":"https://github.com/oauthlib/oauthlib/pull/954","tags":["x_refsource_MISC"],"url":"https://github.com/oauthlib/oauthlib/pull/954"},{"name":"https://github.com/oauthlib/oauthlib/commit/77a5f1c8ce00da2b0b8c5f6e9cc129920085f114","tags":["x_refsource_MISC"],"url":"https://github.com/oauthlib/oauthlib/commit/77a5f1c8ce00da2b0b8c5f6e9cc129920085f114"},{"name":"https://github.com/oauthlib/oauthlib/releases/tag/v4.0.1","tags":["x_refsource_MISC"],"url":"https://github.com/oauthlib/oauthlib/releases/tag/v4.0.1"}],"affected":[{"vendor":"oauthlib","product":"oauthlib","versions":[{"version":">= 3.3.0, < 4.0.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-05T20:58:00.517Z"},"descriptions":[{"lang":"en","value":"OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 3.3.0 until 4.0.1, OAuthLib's RFC 8628 device workflow does not require DeviceCodeGrant.validate_token_request to check that the device_code parameter is present and valid. A caller whose client request is accepted by the configured validator and who knows a valid client ID enabled for the device workflow can submit a missing or bogus device code to the token endpoint and obtain a bearer token without completing device authorization. This issue is fixed in version 4.0.1."}],"source":{"advisory":"GHSA-3jp2-3mrg-2vxc","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/oauthlib/oauthlib/security/advisories/GHSA-3jp2-3mrg-2vxc","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-05T21:14:28.774870Z","id":"CVE-2026-49272","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-05T21:14:43.982Z"}}]}}