Medium severity · published Sep 8, 2026
CVE-2026-86077
n8n: Anonymous Approval-Gate Bypass via Reused resumeToken over the Chat WebSocket
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
< 2.37.7; >= 2.38.0, < 2.38.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86077
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86077
Release Notes
https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7
Release Notes
https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2
Mitigation
https://github.com/n8n-io/n8n/security/advisories/GHSA-35jj-42hp-8gmq
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