CVE-2026-29191 is a critical Cross-Site Scripting (XSS) vulnerability affecting ZITADEL, an open-source identity management platform, specifically versions 4.0.0 through 4.11.1. This flaw, located in the login V2 interface's /saml-post endpoint, could lead to a complete account takeover. With a CVSS score of 9.3 (Critical), it has a low attack complexity and requires user interaction, but allows an unauthenticated attacker to compromise confidentiality and integrity. While there is no evidence of active exploitation, public exploit code, or inclusion in the CISA KEV catalog, the vulnerability has garnered significant community discussion, indicating awareness among security researchers. ZITADEL has released a patch in version 4.12.0 to address this issue.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.0.0, < 4.12.0CPE matchmatch criteria | cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.