Low 2.3Published Jul 10, 2026

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

Updated under an hour ago (Oct 27, 2026, 9:00 PM ET)

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Exploited in the last 30 days

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.

CVSS: 2.3 LOW (v4.0, CNA)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
Weakness (CWE): CWE-284, CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

zitadel zitadel zitadel:zitadel (from the name)	before 4.15.2	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.