CVE-2026-65014

n8n before 2.28.0 (and before 2.27.4 on the 2.27.x branch) registers the DELETE /${restEndpoint}/test-webhook/:id endpoint before authentication middleware is applied, allowing any unauthenticated network caller who knows a workflow ID to cancel that workflow's active test webhook registration. The impact is limited to disrupting in-progress test sessions; production webhooks, persistent workflow state, and stored data are not affected.

CVSS 4.0

6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-25)

CWE

CWE-306

Published

2026-07-22

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Affected

• n8n:n8n

Packages (OSV)

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-33q9-f52j-gc75
• https://www.vulncheck.com/advisories/n8n-before-authentication-bypass-via-test-webhook

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