Answer in brief
CVE-2026-126391 records a High severity (CVSS 7.7) vulnerability in n8n before 1.123.89 RCE via Workflow Expression Evaluation Sandbox Escape. The current sources do not mark it as known exploited. The current feed maps n8n-io/n8n (generic), n8n-io/n8n (generic), n8n-io/n8n (generic), n8n-io/n8n (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps n8n-io/n8n (generic), n8n-io/n8n (generic), n8n-io/n8n (generic), n8n-io/n8n (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| n8n-io/n8ngeneric | >=0 <1.123.89 | 1.123.89 |
| n8n-io/n8ngeneric | >=2.46.0 <2.46.1 | 2.46.1 |
| n8n-io/n8ngeneric | >=2.0.0 <2.45.5 | 2.45.5 |
| n8n-io/n8ngeneric | >=3.0.0 <3.0.1 | 3.0.1 |
Published upstream
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 13, 2026
n8n before 1.123.89 contains an insufficient isolation vulnerability in workflow expression evaluation that allows authenticated users to escape the sandbox. Attackers with permission to create or modify workflows can craft expressions referencing unexpected JavaScript properties to execute arbitrary code on the n8n host.
Quoted source text, attributed separately from HOL analysis.