CVE-2026-86083

Summary

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the legacy expression engine generated source text by calling the mutable global JSON.stringify while printing synthetic string literals and interpolating timezone data. An expression could replace JSON.stringify and cause later generated source to contain executable attacker-controlled code. The affected code-generation paths include packages/@n8n/expression-runtime/src/bridge/isolated-vm-bridge.ts and packages/@n8n/tournament/src/ExpressionBuilder.ts, and the issue does not affect the vm expression engine. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.

Affected Software

VendorProductVersion RangeStatus
n8n-ion8n>= 2.38.0, < 2.38.2affected
n8n-ion8n>= 2.0.0, < 2.37.7affected
n8n-ion8n< 1.123.76affected

Weaknesses

  • CWE-94: CWE-94: Improper Control of Generation of Code ('Code Injection')

References