CVE-2026-77081

published 2026-08-20

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…

Priority P3 43 high 7.1 CVSS 3.1

AV N AC L PR L UI N S U C H I L A N

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

6 ranges

Vendor	Product	Version range	Fixed in
n8n-io	n8n	< 1.123.69	1.123.69
n8n-io	n8n	>= 2.0.0 < 2.33.4	2.33.4
n8n-io	n8n	>= 2.34.0 < 2.34.1	2.34.1
n8n	n8n	< 1.123.69	1.123.69
n8n	n8n	—	—
n8n	n8n	>= 2.0.0 < 2.33.4	2.33.4

CVSS provenance

nvd v3.1 7.1 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

nvd v4.0 5.1 MEDIUM 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CWE-639