CVE-2026-103254 n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal via Resume URL Generation
Attackers with workflow creation permissions can forge approval URLs for unauthorized projects via path traversal in resume URL generation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-103254?
CVE-2026-103254 is a high-severity path traversal vulnerability in n8n-io n8n, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a path traversal vulnerability in signed resume URL generation for Send-and-Wait approvals. Attackers with workflow creation permissions can mint valid approval URLs for gates in projects they cannot access by exploiting unresolved traversal sequences in caller-controlled node IDs, enabling cross-project approval forgery.
Weakness: CWE-22
Which versions are affected by CVE-2026-103254?
How do I fix CVE-2026-103254?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-103254 being exploited?
There is no known exploitation of CVE-2026-103254 in the wild and no public exploit code.
Sources
Also known as GHSA-597w-c3jh-g8fg, GHSA-w2h3-gf8c-fwgw, MINI-f52r-5554-8j52.