CVE-2026-103246CWE-639

CVE-2026-103246

High · published October 1, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
16.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
EPSS
0.00258 · 16.5th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-10-01T15:17Z
References (2)
https://github.com/n8n-io/n8n/security/advisories/GHSA-9rhv-fhr8-7q5r · [email protected]https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credential-disclosure-via-node-tool-introspection · [email protected]
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 10:41Z
    n8n before 2.39.6 and 2.40.x before 2.40.1 Credential Disclosure via Node-Tool Introspection
    cvelistv5