CVE-2026-73683 | BDVDB-2026-359357 Detail

Description#

Laravel Socialite's Facebook provider contains an authentication bypass vulnerability that allows unauthenticated attackers to replay captured OIDC id_tokens by exploiting the missing nonce claim validation in the getUserByOIDCToken() function within FacebookProvider.php. Attackers who obtain a valid, unexpired id_token issued for the same Facebook App ID can submit the captured token to the backend userFromToken() endpoint, bypassing authentication controls because signature, aud, and iss checks pass while no session-bound nonce comparison is performed, resulting in unauthorized access to victim accounts.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-08-14Record published in the CVE List.
2. Version 22026-11-08Most recent update recorded in the CVE List.