CVE-2026-55670

ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers

State: Published
Severity: 2.3 Low
Published: Jul 10, 2026
Updated: Jul 10, 2026
Reserved: Jun 17, 2026

Description

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 organization and exposed to that organization's administrator. This issue is fixed in version 4.15.2.

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-284 Improper Access Control
CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
zitadelzitadel	< 4.15.2Affected

References

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