CVE-2026-72749 json
n8n before 1.123.67 Prototype Pollution via Edit Fields
published 2026-07-22 3 mo ago modified 2026-10-29 10 d ago also GHSA-xwx6-jjhv-84p8 , EUVD-2026-56139
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the Edit Fields (Set) node. The node assigns output fields via a dot-notation path setter without restricting the field name, allowing an authenticated user to name a field after an inherited built-in method path and corrupt a shared global in the main Node.js process. Because that global is used on the request-authentication path, the instance then fails every authenticated request, causing an instance-wide denial of service for all users until the process is restarted.
Patch / fix
- npm n8n 1.123.67, 2.31.5, 2.32.1
- n8n-io n8n 1.123.67, 2.31.5, 2.32.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | n8n | <1.123.67 >=2.32.0, <2.32.1 >=2.0.0-rc.0, <2.31.5 |
1.123.67 2.32.1 2.31.5 |
Affected products
- n8n-io n8n
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
github.com
/n8n-io/n8n/commit/f69dfc6dd2178a14ea1624d2e1d403c2e755042f
web
-
github.com
/n8n-io/n8n/security/advisories/GHSA-xwx6-jjhv-84p8
vendor-advisory, web, mitigation
-
vulncheck.com
/advisories/n8n-before-prototype-pollution-via-edit-fields
third-party-advisory
-
github.com
/n8n-io/n8n
package
-
github.com
/n8n-io/n8n/releases/tag/n8n@1.123.67
web
-
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-2026-72749
- GitHub Advisory GHSA-xwx6-jjhv-84p8
- NVD CVE-2026-72749
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.