[dependabot]

Bumps oauthlib from 4.0.0 to 4.0.1.

Release notes

Sourced from oauthlib's releases.

4.0.1

Security

• CVE-2026-49272 / GHSA-3jp2-3mrg-2vxc: The device code flow token endpoint did not validate the device_code parameter. A request with a known client_id and a bogus device_code could obtain a bearer token. DeviceCodeGrant.validate_token_request now calls DeviceCodeGrant.validate_device_code(), which rejects missing or unknown device codes (invalid_request / invalid_grant) and delegates the code's authorization status to the new RequestValidator.validate_device_code() hook, per RFC 8628 Section 3.5. (cherry-picked from #954)

Upgrade note for device flow integrators

Custom RequestValidator implementations using the device flow must now implement validate_device_code(client_id, code, request). Return one of the DeviceCodeGrant.DEVICE_CODE_* statuses for known codes, or None for an unknown code. When returning AUTHORIZED, the validator must also populate request.user and request.scopes from the stored authorization.

Changelog

Sourced from oauthlib's changelog.

4.0.1 (2026-11-04):

OAuth2.0 Provider (Security):

• Security: CVE-2026-49272 / GHSA-3jp2-3mrg-2vxc: The device code flow token endpoint did not validate the device_code parameter. A request with a known client_id and a bogus device_code could obtain a bearer token. DeviceCodeGrant.validate_token_request now calls a new DeviceCodeGrant.validate_device_code() which rejects missing or unknown device codes (400 invalid_request / 400 invalid_grant) and delegates the code's authorization status to a new required RequestValidator.validate_device_code() hook, per RFC 8628 Section 3.5. (cherry-picked from #954, merged as 1c91d64)

  Upgrade note for device flow integrators: custom RequestValidator implementations using the device flow must now implement validate_device_code(client_id, code, request). Return one of the DeviceCodeGrant.DEVICE_CODE_* statuses (AUTHORIZED, PENDING, SLOW_DOWN or EXPIRED) for known codes, or None for an unknown code. When returning AUTHORIZED, the validator must also populate request.user and request.scopes from the stored authorization.

Commits

• 6e3aa05 Release 4.0.1: fix CVE-2026-49272 (device_code validation in device flow)
• 77a5f1c Merge pull request #954 from hekhuisk/improve-device-workflow
• See full diff in compare view

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