CVE-2026-103254

high

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.

References

https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-path-traversal-via-resume-url-generation

https://github.com/n8n-io/n8n/security/advisories/GHSA-597w-c3jh-g8fg

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-90648

Details

Source: Mitre, NVD

Published: 2026-10-01

Updated: 2026-10-06

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:N/AC:H/Au:S/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 6.3

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N

Severity: Medium

CVSS v4

Base Score: 7

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

Severity: High

EPSS

EPSS: 0.0028