CVE-2026-29191

ZITADEL: 1-Click Account Takeover via XSS in /saml-post Endpoint

State: Published
Severity: 9.3 Critical
Published: Mar 7, 2026
Updated: Mar 9, 2026
Reserved: Mar 4, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.3 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
zitadelzitadel	>= 4.0.0, < 4.12.0Affected

References

https://github.com/zitadel/zitadel/security/advisories/GHSA-pr34-2v5x-6qjq

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