CVE-2026-56351: n8n before version 2.4.0 contains a sql injection vulnerability in MySQL, PostgreSQL, and Microsoft SQL nodes

This month

HIGH 8.2WATCHLISTUPGRADE

CVE-2026-56351 is a high-severity flaw (CVSS 8.2) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n before version 2.4.0 contains a sql injection vulnerability in MySQL, PostgreSQL, and Microsoft SQL nodes that allows authenticated users to inject arbitrary SQL through unescaped identifier values in node configuration parameters. Attackers with workflow creation permissions can supply specially crafted table or column names to execute unauthorized database commands and compromise data integrity.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-06-24
Last modified	2026-06-26

Publisher (CNA): VulnCheck · Vendor: n8n

Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-24 13:16 UTCPublished CVE record published
2026-06-26 02:01 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: < 2.4.0

Fixed in: 2.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls n8n

2. UPGRADE to 2.4.0

npm install n8n@">=2.4.0"

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-2026-56351?

n8n: upgrade to 2.4.0. Exact commands for each OS are on this page.

Is CVE-2026-56351 being exploited?

CVE-2026-56351 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-2026-56351 affect?

CVE-2026-56351 affects n8n. Severity is high (CVSS 8.2). n8n before version 2.4.0 contains a sql injection vulnerability in MySQL, PostgreSQL, and Microsoft SQL nodes that allows authenticated users to inject arbitrary SQL through unescaped identifier values in node configuration parameters. Atta

How urgent is CVE-2026-56351?

Priority 42/100. High severity; On your watchlist

Software pages

MySQL vulnerabilities · PostgreSQL vulnerabilities

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References

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