CVE-2026-105213

HIGH 8.2

ZITADEL before 4.17.1 Authentication Bypass via Login V2 for Deactivated Organizations

CVSS Score

8.2

EPSS Score

0.0%

EPSS Percentile

0th

ZITADEL 4.x before 4.17.1 does not check an organization's inactive state during Login V2 authentication, verifying only the individual user's status. Users of a deactivated organization who hold valid credentials, an existing session, or a refresh token can still sign in, create sessions, and obtain or refresh tokens.

CWE	CWE-287
Vendor	zitadel
Product	zitadel
Published	Oct 4, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Affected Versions

zitadel / zitadel

0 < 4.17.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/zitadel/zitadel/security/advisories/GHSA-558c-v5wc-9w4q vulncheck.com: https://www.vulncheck.com/advisories/zitadel-before-4.17.1-authentication-bypass-via-login-v2-for-deactivated-organizations

Credits

livio-a