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CVE-2026-29191 - Vulnerability Analysis

CriticalCVSS: 9.3

Last Updated: March 9, 2026

ZITADEL - Stored XSS

Published: March 7, 2026Updated: March 9, 2026Remote Exploitable

Overview

ZITADEL 4.0.0 to 4.11.1 contains a stored XSS vulnerability caused by improper input sanitization in the /saml-post login V2 interface, letting attackers perform account takeover via script execution, exploit requires victim interaction.

Severity & Score

Severity: Critical

CVSS Score: 9.3

EPSS Score: 3.4%(Probability of exploitation in next 30 days)

Impact

Attackers can execute scripts to hijack user sessions, leading to account takeover.

Mitigation

Update to version 4.12.0 or later.

References

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

Social Media Activity(1 post)

BeyondMachines :verified:

@beyondmachines1

Mar 10, 2026

Critical 1-Click Account Takeover Vulnerability Patched in ZITADEL IAM Platform ZITADEL patched a critical XSS vulnerability (CVE-2026-29191) that allows unauthenticated attackers to take over user accounts via a single-click malicious link. The flaw can lead to unauthorized password resets. **If you are using ZITADEL, this is important. Plan a very quick update to version 4.12.0 because your users will be hacked, the full exploit instruction is already public. If you cannot patch today, block the /saml-post endpoint at your firewall and ensure MFA is active for all users.** #cybersecurity #infosec #advisory #vulnerability https://beyondmachines.net/event_details/critical-1-click-account-takeover-vulnerability-patched-in-zitadel-iam-platform-1-1-6-i-0/gD2P6Ple2L

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Related Resources

Details

CVE ID: CVE-2026-29191
Severity: Critical
CVSS Score: 9.3
Type: stored_xss
Status: unconfirmed
EPSS: 3.4%
Social Posts: 1

CWE

CWE-79

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS Score

3.4%Probability of exploitation in the next 30 days