CVE-2026-65591
n8n before 1.123.64 Sanitizer Bypass Remote Code Execution
HIGH 8.9EPSS 0.7%
n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.
- Affected
- n8n-io · n8n
- CVSS v4.0 VULNCHECK
- 8.9 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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 - CVSS v4.0 GitHub
- 8.9 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L - CVSS v3.1 NVD
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.69% chance of exploitation in the next 30 days, 52nd percentile
- Published
- 2026-07-22
Proof-of-concept exploits (1)
- IamDremig/CVE-2026-655911★ · 2026-08-10
Security advisories
- n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g
- https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution
- advisories/GHSA-pm35-fqvh-cq5g