Critical severity · published Mar 7, 2026
CVE-2026-29191
ZITADEL: 1-Click Account Takeover via XSS in /saml-post Endpoint
9.3
CVSS
0.4%
EPSS
No
On KEV
Description
ZITADEL is an open source identity management platform. From version 4.0.0 to 4.11.1, a vulnerability in Zitadel's login V2 interface was discovered that allowed a possible account takeover via XSS in /saml-post Endpoint. This issue has been patched in version 4.12.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZI
zitadel · zitadel
>= 4.0.0, < 4.12.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-29191
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-29191
Patch
https://github.com/zitadel/zitadel/security/advisories/GHSA-pr34-2v5x-6qjq
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