High severity · published Oct 4, 2026
CVE-2026-105213
ZITADEL before 4.17.1 Authentication Bypass via Login V2 for Deactivated Organizations
8.2
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZI
zitadel · zitadel
before 4.17.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105213
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105213
vendor-advisory
https://github.com/zitadel/zitadel/security/advisories/GHSA-558c-v5wc-9w4q
third-party-advisory
https://www.vulncheck.com/advisories/zitadel-before-4.17.1-authentication-bypass-via-login-v2-for-deactivated-organizations
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