Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | < 1.123.64, 2.30.0 – < 2.30.1, 2.0.0-rc.0 – < 2.29.8 | 1.123.64 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
IamDremig/CVE-2026-65591 ★ 1 · Aug 10, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | n8n | < 1.123.64 | 1.123.64 | GHSA-pm35-fqvh-cq5g |
| npm | n8n | >= 2.30.0, < 2.30.1 | 2.30.1 | GHSA-pm35-fqvh-cq5g |
| npm | n8n | >= 2.0.0-rc.0, < 2.29.8 | 2.29.8 | GHSA-pm35-fqvh-cq5g |
References
- GitHub Security Advisory (GHSA-pm35-fqvh-cq5g) vendor-advisory
- VulnCheck Advisory: n8n before 1.123.64 Sanitizer Bypass Remote Code Execution third-party-advisory