CVE-2026-55670 ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers

ZITADEL is an open source identity management platform. Prior to 4.15.1, ZITADEL's event store validation can retain the original resource owner for a deleted user identifier, causing a later user recreated with the same identifier in another organization to be provisioned under the original...

CVE-2026-55670

ZITADEL (open source identity management) prior to v4.15.2 is affected by a cross-tenant leakage in the event store validation: when a user is deleted, the original resource owner may remain associated with the deleted user’s ID and, if a new user is recreated in another organization with the sam...

GO-2026-5197 ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers in github.com/zitadel/zitadel

ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers in github.com/zitadel/zitadel...

ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers

Summary A flaw in the user lifecycle enforcement allowed deleted users to retain their original organization/tenant association. Recreating a deleted user under a distinct organization can cause the new user instance to be incorrectly provisioned within the original organization if the previous I...

GHSA-6X8V-2FQ5-2229 ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers

Summary A flaw in the user lifecycle enforcement allowed deleted users to retain their original organization/tenant association. Recreating a deleted user under a distinct organization can cause the new user instance to be incorrectly provisioned within the original organization if the previous I...