CVE-2026-86074 json
n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content
published 2026-09-08 2 mo ago modified 2026-09-11 58 d ago also GHSA-q5wm-mgqx-fv2f , EUVD-2026-73930
- cvss
- 7.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm n8n 2.37.7, 2.38.2
- n8n n8n 2.37.7, 2.38.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.9 | 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 |
| CNA | 4.0 | 5.9 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | n8n | >=2.38.0, <2.38.2 <2.37.7 |
2.38.2 2.37.7 |
Affected products
- n8n-io n8n
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/n8n-io/n8n/security/advisories/GHSA-q5wm-mgqx-fv2f
web, mitigation, vendor-advisory
-
github.com
/n8n-io/n8n/releases/tag/n8n@2.37.7
web, release-notes
-
github.com
/n8n-io/n8n/releases/tag/n8n@2.38.2
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-86074
advisory
-
github.com
/n8n-io/n8n
package
Sources
- CVE List CVE-2026-86074
- GitHub Advisory GHSA-q5wm-mgqx-fv2f
- NVD CVE-2026-86074
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.