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Back to active CVEs
Medium · CVSS 5.3CVE-2026-118640

n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization BypassCVE-2026-118640

Answer in brief

CVE-2026-118640 records a Medium severity (CVSS 5.3) vulnerability in n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization Bypass. 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). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 28, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. 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.

Affected scope and exposure questions

The current feed maps n8n-io/n8n (generic), n8n-io/n8n (generic), n8n-io/n8n (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
n8n-io/n8ngeneric>=0 <1.123.851.123.85
n8n-io/n8ngeneric>=2.44.0 <2.44.12.44.1
n8n-io/n8ngeneric>=2.0.0 <2.43.52.43.5

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for n8n-io/n8n, n8n-io/n8n, n8n-io/n8n.
  2. 2Review the reported fix. Update n8n-io/n8n to 1.123.85; n8n-io/n8n to 2.44.1; n8n-io/n8n to 2.43.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 28, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

n8n before 1.123.85, 2.43.5, and 2.44.1 contains an authorization bypass vulnerability in Chat Hub that allows chat-only users to register restricted tool types. Users with the global:chatUser role can add and run tools through chat to execute sandboxed code, access permitted files, and use instance workflows, Data Tables, and agents.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • n8n before 1.123.85, 2.43.5, and 2.44.1 OData $filter Injection via Outlook and SharePoint NodesSame n8n-io/n8n package
  • n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Permission Check Bypass via Inline Sub-WorkflowsSame n8n-io/n8n package
  • n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Exposure via Node Execution Error DataSame n8n-io/n8n package
  • n8n before 2.41.5 and 2.42.2 Credential Theft via Error-Workflow Context InheritanceSame n8n-io/n8n package
  • n8n before 1.123.85, 2.43.5, and 2.44.1 Filter Injection via Quick Base Node Where ParameterSame n8n-io/n8n package
  • n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files NodeSame n8n-io/n8n package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-863
Source
CVE List V5
Source checked
Oct 28, 2026
References
2 linked sources
Open source record