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/

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-65014 is a medium-severity flaw (CVSS 5.3) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-07-22
Last modified	2026-10-24

Publisher (CNA): VulnCheck · Vendor: n8n

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-22 12:18 UTCPublished CVE record published
2026-10-24 17:10 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: >= 2.27.0 and < 2.27.4

Fixed in: 2.27.4

Safe to downgrade to: a release before 2.27.0

1. Check installed version

npm ls n8n

2. UPGRADE to 2.27.4

npm install n8n@">=2.27.4"

3. If no update is available yet, DOWNGRADE to a release before 2.27.0

npm view n8n versions npm install n8n@"<2.27.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

npm · n8n · FIXED · 2.27.4 · vulnerable: < 2.27.4 · source

npm install n8n@">=2.27.4" npm ls n8n

Fedora 46 · newscache · FIXED · 1.3.22-1.fc46 · FEDORA-2026-49b088f8ca · source

sudo dnf upgrade --advisory=FEDORA-2026-49b088f8ca

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-65014?

n8n: upgrade to 2.27.4. Exact commands for each OS are on this page.

Is CVE-2026-65014 being exploited?

CVE-2026-65014 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-65014 affect?

CVE-2026-65014 affects n8n. Severity is medium (CVSS 5.3). 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 c

How urgent is CVE-2026-65014?

Priority 35/100. Remotely exploitable, no login, no user action

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References

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