CVE-2026-65591: n8n: Legacy Expression Evaluator Sanitizer Bypass Leads to Authenticated Code Execution
The legacy expression evaluator’s computed-member sanitizer can be bypassed by an authenticated user with workflow create or modify permissions. Successful exploitation grants the attacker host-level code execution as the n8n process.
The legacy expression engine is the default engine in affected versions.
References
- github.com/advisories/GHSA-pm35-fqvh-cq5g
- github.com/n8n-io/n8n/releases/tag/n8n@1.123.64
- github.com/n8n-io/n8n/releases/tag/n8n@2.29.8
- github.com/n8n-io/n8n/releases/tag/n8n@2.30.1
- github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g
- nvd.nist.gov/vuln/detail/CVE-2026-65591
- www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution
Code Behaviors & Features
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