CVSS 4.0
8.7 highCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:NCVE-2026-86076
High (8.7) in n8n n8n. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in n8n 1.123.76, 2.37.7, 2.38.2.
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the expression compiler sanitizer resolved through dynamically scoped this and did not reject reserved class member names. A class field named __sanitize could rebind the sanitizer and reach the Function constructor, enabling backend code execution and editor-preview JavaScript execution. The affected AST hook is PrototypeSanitizer in packages/workflow/src/expression-sandboxing.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
Severity
CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
- CWE
- CWE-94
- Published
- Modified
- Record from
- the NVD, synced
Affected
- n8n:n8n
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-hw8v-xxg5-vvvx | npm | n8n | <1.123.76 | 1.123.76 |
| GHSA-hw8v-xxg5-vvvx | npm | n8n | >=2.38.0 <2.38.2 | 2.38.2 |
| GHSA-hw8v-xxg5-vvvx | npm | n8n | >=2.0.0 <2.37.7 | 2.37.7 |