EUVD-2026-74279
GHSA-35jj-42hp-8gmq
Severity by source
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
AC:H reflects the prerequisite of holding a valid resumeToken; S:C because the bypass affects approval gates governing subsequent workflow execution beyond the chat component.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
The /chat WebSocket endpoint in n8n workflow automation platform fails to validate that a supplied resumeToken targets a chat-compatible node, allowing any holder of a valid token - including anonymous form submitters - to bypass Send-and-Wait, non-chat Human-in-the-Loop (HITL), and Wait approval gates in paused workflow executions. Affected versions are n8n below 2.37.7 and n8n 2.38.0-2.38.1, with vendor-confirmed fixes released 2026-09-02. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a valid resumeToken previously distributed to them as part of an n8n workflow form-submission interaction. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 6.3 with AT:P (Attack Requirements: Present) reflects that exploitation is gated on the attacker possessing a valid resumeToken obtained through prior workflow interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to n8n 2.37.7 (for 2.37.x deployments) or n8n 2.38.2 (for 2.38.x deployments); both patched releases are tagged at github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 and github.com/n8n-io/n8n/releases/tag/n8n@2.38.2 respectively. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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