Vulnerability · Published Sep 8, 2026 · Assigned by GitHub_M

CVE-2026-86077n8n: Anonymous Approval-Gate Bypass via Reused resumeToken over the Chat WebSocket

Medium 6.3

In plain English

A medium-severity missing authorization in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.3Medium

Exploit odds (30 days)0.4%top 62.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	2.38.2	GHSA-35jj-42hp-8gmq
npm	n8n	2.37.7	GHSA-35jj-42hp-8gmq

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	< 2.37.7>= 2.38.0, < 2.38.2

Weakness: CWE-862 · Vector: 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

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-35jj-42hp-8gmq x_refsource_CONFIRM
https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 x_refsource_MISC
https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2 x_refsource_MISC