CVE-2026-86077

published 2026-09-08

CVE-2026-86077: n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the /chat WebSocket route accepted a resumeToken and resumed a paused execution…

Priority P3 37 medium 6.5 CVSS 3.1

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

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the /chat WebSocket route accepted a resumeToken and resumed a paused execution without checking that the target node supported chat messages. An anonymous form submitter who received that token could reuse it on the chat route to release a Send-and-Wait, non-chat HITL, or Wait approval gate. The affected authorization logic is packages/cli/src/chat/chat-execution-manager.ts, where canResumeOverChat did not gate the resume target. This issue is fixed in versions 2.37.7 and 2.38.2.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
n8n-io	n8n	< 2.37.7	2.37.7
n8n-io	n8n	—	—
n8n	n8n	< 2.37.7	2.37.7
n8n	n8n	>= 0 < 2.37.7	2.37.7
n8n	n8n	>= 2.38.0 < 2.38.2	2.38.2
n8n	n8n	>= 2.38.0 < 2.38.2	2.38.2

CVSS provenance

nvd v3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

nvd v4.0 6.3 MEDIUM CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/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-862