Vulnerability · Published Aug 20, 2026 · Assigned by VulnCheck
CVE-2026-77081n8n before 1.123.69 Allowed-Domains Bypass via GraphQL Node
Medium 5.1
In plain English
A medium-severity authorization bypass via user-controlled key in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Official 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.
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N
References
- GitHub Security Advisory (GHSA-wcv8-x773-j96r) vendor-advisory
- VulnCheck Advisory: n8n before 1.123.69 Allowed-Domains Bypass via GraphQL Node third-party-advisory