CVE-2026-33696: n8n Prototype Pollution RCE in XML and GSuite Admin

An authenticated user with workflow creation or modification privileges in n8n workflow automation platform can exploit the Merge node's 'Combine by SQL' mode to read arbitrary local files on the n8n host and achieve remote code execution. n8n versions prior to 2.14.1, 2.13.3, and 1.123.26 are affected. The vulnerability carries a CVSS 4.0 score of 9.4 (Critical) due to insufficient sandbox restrictions in the AlaSQL component, allowing SQL injection-style attacks against the host system. No public proof-of-concept or active exploitation (KEV) status has been reported at this time.

n8n workflow automation platform Community Edition contains an authorization bypass vulnerability allowing authenticated users with member-level privileges to steal plaintext credentials from other users. The flaw chains name-based credential resolution that doesn't enforce ownership with a permissions bypass affecting generic HTTP credential types (httpBasicAuth, httpHeaderAuth, httpQueryAuth). Attackers can decrypt and exfiltrate credentials without authorization, though native integration credentials remain unaffected.