Vulnerability · Published Sep 8, 2026 · Assigned by GitHub_M

CVE-2026-86074n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content

Medium 5.9

In plain English

A medium-severity server-side request forgery in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.9Medium

Exploit odds (30 days)0.4%top 68.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the Instance AI credential setup flow accepted a credential test or verification URL without checking that it matched the workflow node's origin. Attacker-controlled fetched content could influence that URL after a user injected it into the setup flow, causing authenticated requests, redirects, or probes to reach another origin. The affected logic includes packages/@n8n/instance-ai/src/tools/workflows/credential-utils.ts and the extractServiceOrigin origin derivation. This issue is fixed in versions 2.37.7 and 2.38.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	2.38.2	GHSA-q5wm-mgqx-fv2f
npm	n8n	2.37.7	GHSA-q5wm-mgqx-fv2f

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	< 2.37.7>= 2.38.0, < 2.38.2

Weakness: CWE-918 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-q5wm-mgqx-fv2f x_refsource_CONFIRM
https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 x_refsource_MISC
https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2 x_refsource_MISC