{"items":[{"id":"NVI-00002243","kind":"vulnerability","title":"Laravel Passport: TokenGuard Authenticates Unrelated User for Client Credentials Tokens","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-349c-2h2f-mxf6","CVE-2026-39976"],"plain_summary":"OSV carries this publisher advisory for laravel/passport. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 13.7.1 for laravel/passport. Confirm the publisher’s latest guidance.","source_ids":["sr-110d18fbf17c8bd4da0b593a35615005"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. 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Any machine-to-machine token can inadvertently authenticate as an actual user.\n\n\nUsage of `EnsureClientIsResourceOwner` middleware together with `Passport::$clientUuids` set to `false`, can result in resolving the user instead, as stated in the documentation. \n\n> The underlying OAuth2 server sets the token's sub claim to the client's identifier for client credentials tokens. By default, Passport uses UUIDs for clients, so this cannot collide with a user's integer primary key. However, if you have set Passport::$clientUuids to false, a client credentials token may inadvertently resolve a user whose ID matches the client's ID. 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Any machine-to-machine token can inadvertently authenticate as an actual user.\n\n\nUsage of `EnsureClientIsResourceOwner` middleware together with `Passport::$clientUuids` set to `false`, can result in resolving the user instead, as stated in the documentation. \n\n> The underlying OAuth2 server sets the token's sub claim to the client's identifier for client credentials tokens. By default, Passport uses UUIDs for clients, so this cannot collide with a user's integer primary key. However, if you have set Passport::$clientUuids to false, a client credentials token may inadvertently resolve a user whose ID matches the client's ID. 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The token guard then passes this value to retrieveById() without validating it's actually a user identifier, potentially resolving an unrelated real user. Any machine-to-machine token can inadvertently authenticate as an actual user.\n\n\nUsage of `EnsureClientIsResourceOwner` middleware together with `Passport::$clientUuids` set to `false`, can result in resolving the user instead, as stated in the documentation. \n\n> The underlying OAuth2 server sets the token's sub claim to the client's identifier for client credentials tokens. By default, Passport uses UUIDs for clients, so this cannot collide with a user's integer primary key. However, if you have set Passport::$clientUuids to false, a client credentials token may inadvertently resolve a user whose ID matches the client's ID. 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In such cases, using this middlew","public_affected_ranges":["ECOSYSTEM: introduced 13.0.0; fixed 13.7.1"]}],"null_published_at":"2026-10-31T21:54:04.903Z","source_updated_at":"2026-04-13T18:11:23.408Z","source_disclosed_at":"2026-04-08T19:57:55.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:41:49.649Z"}],"next_cursor":null,"snapshot_revision":"42594"}