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  4. CVE 2026 103246 n8n before 2396 and 240x before 2401 credential
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Back to active CVEs
High · CVSS 8.3CVE-2026-103246

n8n before 2.39.6 and 2.40.x before 2.40.1 Credential Disclosure via Node-Tool Introspection

Answer in brief

CVE-2026-103246 records a High severity (CVSS 8.3) vulnerability in n8n before 2.39.6 and 2.40.x before 2.40.1 Credential Disclosure via Node-Tool Introspection. The current sources do not mark it as known exploited. The current feed maps 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 1, 2026Updated Oct 1, 2026Source checked Oct 2, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.3. 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). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
n8n-io/n8ngeneric>=0 <2.39.6 || >=2.40.0 <2.40.12.39.6, 2.40.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for n8n-io/n8n.
  2. 2Review the reported fix. Update n8n-io/n8n to 2.39.6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 1, 2026

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

  2. Source modified

    Oct 1, 2026

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

  3. First seen by HOL

    Oct 1, 2026

Sources and claim methodology

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

n8n versions before 2.39.6 and 2.40.0 before 2.40.1 fail to validate credential ownership during inline agent node-tool introspection. Attackers can reference arbitrary credential IDs to decrypt and exfiltrate plaintext secrets to attacker-controlled hosts without ownership verification.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-639
Source
CVE List V5
Source checked
Oct 2, 2026
References
2 linked sources
Open source record