Critical n8n Expression-Sandbox Bypass Enables RCE
⚠️A critical vulnerability (CVE-2026-25049, CVSS 9.4) in the n8n workflow automation platform can allow authenticated users with workflow edit rights to execute arbitrary system commands by abusing expression evaluation. The flaw bypasses prior fixes for CVE-2025-68613 and can be triggered by crafted expressions — including a single-line JavaScript destructuring payload — that escape the expression sandbox. Affected releases are <1.123.17 (fixed in 1.123.17) and <2.5.2 (fixed in 2.5.2). Operators should apply the updates immediately or, if patching is not possible, restrict workflow creation to trusted users and harden host and network privileges.
