CVE-2026-86073

Medium

Elevated severity or exploit probability.

CVSS base

7.6 HIGH

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

EPSS — probability of exploitation (30 days)

0.2%

12.5th percentile

CISA KEV

Not listed

Weakness / dates

CWE-863

Published 2026-09-08 · modified 2026-09-11

CVSS breakdown

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

Attack Vector	N	Network
Attack Complexity	L	Low
Privileges Required	N	None
User Interaction	R	Required
Scope	U	Unchanged
Confidentiality	H	High
Integrity	L	Low
Availability	L	Low

Timeline

2026-09-08 — Published (NVD)
2026-09-11 — Last modified (NVD)

Description

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.

Affected

n8n

References

Official: NVD · CVE.org