{"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"}}]}}

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{"affected": [{"affectedData": [{"product": "oauthlib", "vendor": "oauthlib", "versions": [{"status": "affected", "version": ">= 3.3.0, < 4.0.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-49272", "lastModified": "2026-11-05T21:18:50.447", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.1, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-05T21:18:50.447", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/commit/77a5f1c8ce00da2b0b8c5f6e9cc129920085f114"}, {"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/pull/954"}, {"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/releases/tag/v4.0.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/security/advisories/GHSA-3jp2-3mrg-2vxc"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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