Authorization bypass through user-controlled key in n8n - #VU153000
Published: September 30, 2026
Vulnerability identifier: #VU153000
CSH Severity: Low
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to access private agent conversations and approve pending tool calls on behalf of other project members.
The vulnerability exists due to improper authorization in the agent tool-call resume endpoint and related conversation read endpoints when handling requests containing run identifiers. A remote user can supply another user's run identifier and use the project-scoped read endpoints to access private agent conversations and approve pending tool calls on behalf of other project members.
The targeted conversation must contain a pending tool approval.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 2.41.4, 2.42.0