CVE-2026-56348: n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/o

This month

CRITICAL 9.1UPGRADE

CVE-2026-56348 is a critical-severity flaw (CVSS 9.1) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/options endpoint that allows authenticated users to bypass Allowed HTTP Request Domains restrictions. Attackers with credential access can cause the n8n server to issue HTTP requests with credentials to unauthorized hosts, exfiltrating sensitive authentication data.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-06-22
Last modified	2026-06-24

Publisher (CNA): VulnCheck · Vendor: n8n

Last updated 2026-06-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-22 22:16 UTCPublished CVE record published
2026-06-24 16:46 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: < 2.20.0

Fixed in: 2.20.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls n8n

2. UPGRADE to 2.20.0

npm install n8n@">=2.20.0"

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-2026-56348?

n8n: upgrade to 2.20.0. Exact commands for each OS are on this page.

Is CVE-2026-56348 being exploited?

CVE-2026-56348 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-2026-56348 affect?

CVE-2026-56348 affects n8n. Severity is critical (CVSS 9.1). n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/options endpoint that allows authenticated users to bypass Allowed HTTP Request Domains restrictions. Attackers with credential acc

How urgent is CVE-2026-56348?

Priority 42/100. Critical severity

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References

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