Source: python-oauthlib Version: 3.3.1-2 X-Debbugs-CC: [email protected] Severity: important Tags: security upstream Forwarded: https://github.com/oauthlib/oauthlib/pull/920
Hi, The following vulnerability was published for python-oauthlib. CVE-2026-118669[0]: | OAuthLib is an implementation of the OAuth request-signing logic for | Python 3.6+. Prior to 4.0.0, the client_credentials and Resource | Owner Password Credentials token grant handlers can authenticate | request.client as one confidential client while retaining an | attacker-supplied request.client_id for validate_grant_type and | validate_scopes. A lower-privilege authenticated client can | therefore cause grant and scope authorization to use another | client's identity when an application validator relies on the | documented client_id argument, potentially issuing tokens with | unauthorized grants or scopes. Validators that authorize exclusively | from request.client may not be affected. This issue is fixed in | version 4.0.0. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-118669 https://www.cve.org/CVERecord?id=CVE-2026-118669 [1] https://github.com/oauthlib/oauthlib/security/advisories/GHSA-7984-qgvg-3j9c [2] https://github.com/oauthlib/oauthlib/pull/920 [3] https://github.com/oauthlib/oauthlib/commit/c951a1d09f99f14e3240973fa83c4f4287d4753d Please adjust the affected versions in the BTS as needed. Regards, Salvatore
