VULNERABILITY INTELLIGENCE

CVE-2026-77081

CVSS score7.1 HIGH
EPSS probability0.38%
CISA KEVNot currently listed
Published2026-08-20
Last modified2026-09-01
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Description

n8n before 1.123.69, 2.x before 2.33.4, and 2.x before 2.34.1 contain an allowed-domains bypass in the GraphQL node. When the node's Authentication parameter is set to expression mode, every authentication-gated credential selector is treated as active; if two credentials of different types are attached, the node enforces the allowed-domains policy of only the first credential while still attaching material from both. An authenticated user with workflow-authoring rights can thereby send a domain-restricted credential to an attacker-controlled endpoint, exfiltrating it with the leaked credential's permissions.

Weakness classification

  • disclosure@vulncheck.com: CWE-639

Primary references