Auth bypass in Zitadel
CVE-2026-105213
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/zitadel/zitadel/security/advisories/GHSA-558c-v5wc-9w4q (vendor-advisory)
- www.vulncheck.com/advisories/zitadel-before-4.17.1-authentication-bypass-via-lo… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-105213?
- CVE-2026-105213 is a high-severity vulnerability in Zitadel, classified under Improper Authentication. CVSS score: 8.2/10. Published 2026-10-04.
- How severe is CVE-2026-105213?
- High severity. CVSS v3 base score is 8.2 out of 10.