CVE-2026-86074
n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Active
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content
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.
- Record
CVE-2026-86074- CVSS 4.0
- 5.9 Medium
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 - Weakness
- CWE-918
- Updated
- 2026-11-02
EUVDEUVD-2026-73930
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.
- Record
EUVD-2026-73930- CVSS 4.0
- 5.9 Medium
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-q5wm-mgqx-fv2f
n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content
Impact
Instance AI credential setup accepted a credential test/verification URL without checking it matched the workflow node's origin. Exfiltration required the user to actively inject an attacker-controlled URL into the setup flow. The patch derives the credential destination from the node's own URL and confines authenticated requests, redirects and probes to that origin.
Patches
The issue has been fixed in n8n versions 2.38.2 and 2.37.7. Users should upgrade to one of these versions or later to remediate the vulnerability.
Workarounds
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
- Disable the Instance AI module by removing
instance-aifrom theN8N_ENABLED_MODULESenvironment variable if it is not required. - Restrict n8n instance access to fully trusted users only.
- Rotate any third-party API credentials that were set up using the Instance AI credential-setup flow on affected versions.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
- Record
GHSA-q5wm-mgqx-fv2f- CVSS 4.0
- 5.9 Medium
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 - Weakness
- CWE-918
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-86074- CVSS 4.0
- 5.9 Medium
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 - CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
OSV
n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content
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.
- Record
CVE-2026-86074- CVSS 4.0
- 5.9 Medium
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 - Weakness
- CWE-918
- Updated
- 2026-11-02
OSVGHSA-q5wm-mgqx-fv2f
n8n: Instance AI Credential Setup Accepts Unvalidated Probe URL from Fetched Content
Impact
Instance AI credential setup accepted a credential test/verification URL without checking it matched the workflow node's origin. Exfiltration required the user to actively inject an attacker-controlled URL into the setup flow. The patch derives the credential destination from the node's own URL and confines authenticated requests, redirects and probes to that origin.
Patches
The issue has been fixed in n8n versions 2.38.2 and 2.37.7. Users should upgrade to one of these versions or later to remediate the vulnerability.
Workarounds
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
- Disable the Instance AI module by removing
instance-aifrom theN8N_ENABLED_MODULESenvironment variable if it is not required. - Restrict n8n instance access to fully trusted users only.
- Rotate any third-party API credentials that were set up using the Instance AI credential-setup flow on affected versions.
These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
- Record
GHSA-q5wm-mgqx-fv2f- CVSS 4.0
- 5.9 Medium
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 - Weakness
- CWE-918
- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-86074 is a medium vulnerability (CVSS 5.9) in N8n, published September 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 31st percentile. Fixed in n8n 2.38.2.
References
github.com/n8n-io/n8n/security/advisories/GHSA-q5wm-mgqx-fv2f
nvd.nist.gov/vuln/detail/CVE-2026-86074