Vulnerability · Published Mar 7, 2026 · Assigned by GitHub_M
CVE-2026-29191ZITADEL: 1-Click Account Takeover via XSS in /saml-post Endpoint
Critical 9.3
In plain English
A critical-severity cross-site scripting in zitadel from zitadel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.3Critical
Exploit odds (30 days)0.5%top 60.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/zitadel/zitadel | 4.12.0 | GHSA-pr34-2v5x-6qjq |
| Go | github.com/zitadel/zitadel | no fix listed | GO-2026-4607 |
| Go | github.com/zitadel/zitadel/v2 | 4.12.0 | GHSA-pr34-2v5x-6qjq |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
References
- https://github.com/zitadel/zitadel/security/advisories/GHSA-pr34-2v5x-6qjq x_refsource_CONFIRM