Severity:

CRITICAL RISK

(10.0)

Missing Auth on MCP Browser HTTP (CWE-306) in n8n

CVE-2026-54309

Published:

Jun 23, 2026

Status:

Analyzed

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-74;CWE-94

HIGH RISK

HIGH

(7.3)

Code Injection (CWE-94) in ANTLR4 Grammar Action Block

Arbitrary Code Execution in Generated Artifacts

June 28, 2026

CWE-74;CWE-89

HIGH RISK

HIGH

(7.3)

SQL Injection (CWE-89) in Restaurant Password Reset

Authentication Data Exposure and Account Compromise

June 28, 2026

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-306

Impact:

Unauthorized Browser Control and Account Compromise

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-306

Impact:

Unauthorized Browser Control and Account Compromise

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

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Missing Auth on MCP Browser HTTP (CWE-306) in n8n

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

HIGH RISK

HIGH

(7.3)

Code Injection (CWE-94) in ANTLR4 Grammar Action Block

HIGH RISK

HIGH

(7.3)

SQL Injection (CWE-89) in Restaurant Password Reset

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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