CVSS 4.0
5.9 mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:L/SC:N/SI:N/SA:NCVE-2026-86073
Medium (5.9) in n8n n8n. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in n8n 2.37.7, 2.38.1.
n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.1, the OAuth token endpoint bound an authorization code's first access token to the consented resource but did not bind its refresh token. Refreshing checked only that the requested resource was registered, not that it matched the original grant. An OAuth client approved for one workflow could substitute a different workflow URL in the resource parameter and obtain a valid token for an unapproved workflow accessible to the consenting user. This issue is fixed in versions 2.37.7 and 2.38.1.
Severity
CVSS 3.1
7.6 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- n8n:n8n
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-cw9w-vv67-hf73 | npm | n8n | >=2.38.0 <2.38.1 | 2.38.1 |
| GHSA-cw9w-vv67-hf73 | npm | n8n | <2.37.7 | 2.37.7 |