CVE-2026-77081

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.

• CWE-639

• https://github.com/n8n-io/n8n/security/advisories/GHSA-wcv8-x773-j96rMitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/n8n-before-allowed-domains-bypass-via-graphql-nodeThird Party Advisory

Published

Aug 20, 2026

Last Modified

Sep 1, 2026

Status

Analyzed

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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