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.
{
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77081.json",
"cwe_ids": [
"CWE-639"
]
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "1.123.69"
},
{
"introduced": "2.34.0"
},
{
"fixed": "2.34.1"
},
{
"introduced": "2.0.0"
},
{
"fixed": "2.33.4"
}
],
"source": "AFFECTED_FIELD"
}