CVE-2026-86077 (GCVE-0-2026-86077)

Vulnerability from cvelistv5 – Published: 2026-09-08 21:28 – Updated: 2026-09-14 12:05
VLAI
Title
n8n: Anonymous Approval-Gate Bypass via Reused resumeToken over the Chat WebSocket
Summary
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.
Severity
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
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 12:04 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
n8n-io n8n Affected: < 2.37.7
Affected: >= 2.38.0, < 2.38.2
guessed Create a notification for this product.
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