Time-of-check Time-of-use (TOCTOU) Race Condition in n8n - CVE-2026-25052
Published: February 6, 2026
Vulnerability identifier: #VU122432
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-25052
CWE-ID: CWE-367
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 escalate privileges on the system.
The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in the file access controls. A remote user can obtain critical configuration data and user credentials to gain elevated privileges on the target system.
How to mitigate CVE-2026-25052
Install updates from vendor's website.