CVE-2026-72768 json
n8n before 2.32.1 SSRF Protection Bypass via MCP Client
published 2026-07-22 3 mo ago modified 2026-10-29 10 d ago also GHSA-vhf8-cg2h-cg3p , EUVD-2026-56094
- cvss
- 8.3
- 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 34%
- public exploits
- 0
- none known
Summary
n8n versions before 2.32.1 contain a server-side request forgery protection bypass vulnerability in the MCP Client node that allows authenticated users to bypass SSRF protections. Attackers can craft workflows that send requests to internal or blocked hosts without routing through SSRF protection, exposing internal services and reading responses back through the workflow.
Patch / fix
- npm n8n 2.31.5, 2.32.1
- n8n-io n8n 2.31.5, 2.32.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:L |
| CNA | 4.0 | 6.4 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:L/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 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | n8n | >=2.32.0, <2.32.1 <2.31.5 |
2.32.1 2.31.5 |
Affected products
- n8n-io n8n
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/n8n-io/n8n/commit/f69dfc6dd2178a14ea1624d2e1d403c2e755042f
web
-
github.com
/n8n-io/n8n/security/advisories/GHSA-vhf8-cg2h-cg3p
vendor-advisory, web, mitigation
-
vulncheck.com
/advisories/n8n-before-ssrf-protection-bypass-via-mcp-client
third-party-advisory
-
github.com
/n8n-io/n8n
package
-
github.com
/n8n-io/n8n/releases/tag/n8n@2.31.5
web
-
github.com
/n8n-io/n8n/releases/tag/n8n@2.32.1
web
Sources
- CVE List CVE-2026-72768
- GitHub Advisory GHSA-vhf8-cg2h-cg3p
- NVD CVE-2026-72768
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