CVE-2026-59207 json
n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector
published 4mo ago modified 17d ago also GHSA-h44j-f5r5-ph73 , EUVD-2026-42609
- cvss
- 6.5
- 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 39%
- public exploits
- 0
- none known
Summary
n8n is an open source workflow automation platform. Prior to 2.27.4 and 2.28.1, the AI Agents feature did not enforce the Allowed HTTP Request Domains restriction configured on credentials when an MCP tool was pointed at an arbitrary URL, allowing a member-level user with use-only access to a shared credential to send its secret to an external server they control. This issue is fixed in versions 2.27.4 and 2.28.1.
Patch / fix
- npm n8n 2.27.4, 2.28.1
- n8n n8n 2.27.4
Is CVE-2026-59207 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/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 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | n8n | >=2.28.0, <2.28.1 <2.27.4 |
2.28.1 2.27.4 |
Affected products
- n8n-io n8n
Classification
- Weakness
-
- CWE-693 Protection Mechanism Failure
References
-
github.com
/n8n-io/n8n/security/advisories/GHSA-h44j-f5r5-ph73
web, vendor-advisory
-
github.com
/n8n-io/n8n/releases/tag/n8n%402.27.4
web, release-notes
-
github.com
/n8n-io/n8n/releases/tag/n8n%402.28.1
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-59207
advisory
-
github.com
/n8n-io/n8n
package
Sources
- CVE List CVE-2026-59207
- GitHub Advisory GHSA-h44j-f5r5-ph73
- NVD CVE-2026-59207
Fencer Intel 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.