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Advisories

n8n before 2.39.6 and 2.40.x before 2.40.1 Session Token Leak via Dynamic Credentials

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severity
high
date
Affecting

  • n8n >= 0, < 2.39.6

  • n8n >= 2.40.0, < 2.40.1

CWE
  • CWE-863 Incorrect Authorization
CVSS
8.5
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:L/SA:N
Credit
nlgbao1340
Description
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a session token leakage vulnerability in the Dynamic Credentials authorize and revoke endpoints. Attackers with resolver registration capability can capture collaborators' session tokens by setting a fallback resolver to an attacker-controlled endpoint during the account connection flow, enabling unauthorized credential access.

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