Is this vulnerability remotely exploitable?

Yes. Because the login V2 interface is typically internet-accessible, a remote attacker can craft malicious requests or SAML flows and lure victims into visiting them, leading to XSS-based account takeover.

What level of access does an attacker need to exploit this?

The attacker generally needs only the ability to send crafted links or initiate SAML login flows that influence the data rendered by the /saml-post endpoint. They do not need prior authentication to the victim's account, but they must convince the victim to interact with the malicious flow.

What is the safest general fix pattern for this issue?

The most robust fix is to enforce strict context-aware output encoding for all untrusted data rendered in the login and SAML-related pages, combined with strong input validation and the avoidance of directly injecting raw SAML or request parameters into templates.

Severity:

CRITICAL RISK

(9.3)

Cross-Site Scripting (CWE-79) in ZITADEL Login V2 /saml-post Endpoint

CVE-2026-29191

Published:

Mar 7, 2026

Status:

Received

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-78

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

Remote Code Execution

March 7, 2026

CWE-89

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Account Takeover via Client-Side Code Execution

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Account Takeover via Client-Side Code Execution

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

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Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Cross-Site Scripting (CWE-79) in ZITADEL Login V2 /saml-post Endpoint

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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