What’s Vulnerable › Vulnerabilities

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

• Severity: low (CVSS 2.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-07-10
• Weakness: CWE-284

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.

Affected products

• zitadel: before 4.15.2

References

• https://github.com/zitadel/zitadel/commit/a939b847d90c3370bd162064e57764b89c01be46
• https://github.com/zitadel/zitadel/pull/12261
• https://github.com/zitadel/zitadel/releases/tag/v4.15.2
• https://github.com/zitadel/zitadel/security/advisories/GHSA-6x8v-2fq5-2229

Get alerted when CVE-2026-55670 or the next vulnerability affects your stack