CVE-2026-56668

Beschreibung

ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL-s OAuth2 Token Exchange endpoint for urn:ietf:params:oauth:grant-type:token-exchange does not verify that the subject token belongs to the requesting client or that requested scopes remain within the original token-s scopes, allowing a low-privilege token to be exchanged for elevated permissions at another application. This issue is fixed in version 4.15.3.