Authentication Bypass by Spoofing in n8n - CVE-2026-54308
Published: June 16, 2026
Vulnerability identifier: #VU134564
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-54308
CWE-ID: CWE-290
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: n8n
Affected software:
n8n
n8n
Detailed vulnerability description
The vulnerability allows a remote attacker to execute workflows with attacker-controlled data.
The vulnerability exists due to authentication bypass by spoofing in the MicrosoftAgent365Trigger and StripeTrigger nodes when handling inbound webhook requests. A remote attacker can submit a forged payload to execute workflows with attacker-controlled data.
Exploitation requires knowledge of the webhook URL.
How to mitigate CVE-2026-54308
Install security update from vendor's website.