CVE-2026-33665: n8n is an open source workflow automation platform

Q: How do I fix CVE-2026-33665?

n8n: upgrade to 1.121.0, 2.4.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33665 being exploited?

CVE-2026-33665 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33665 affect?

CVE-2026-33665 affects n8n. Severity is high (CVSS 7.5). n8n is an open source workflow automation platform. Prior to versions 2.4.0 and 1.121.0, when LDAP authentication is enabled, n8n automatically linked an LDAP identity to an existing local account if the LDAP email attribute matched the loc

Routine

HIGH 7.5UPGRADE

CVE-2026-33665 is a high-severity flaw (CVSS 7.5) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n is an open source workflow automation platform. Prior to versions 2.4.0 and 1.121.0, when LDAP authentication is enabled, n8n automatically linked an LDAP identity to an existing local account if the LDAP email attribute matched the local account's email. An authenticated LDAP user who could control their own LDAP email attribute could set it to match another user's email — including an administrator's — and upon login gain full access to tha

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-03-25
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: n8n

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-25 18:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: < 1.121.0 · >= 2.0.0 and < 2.4.0

Fixed in: 1.121.0, 2.4.0

Safe to downgrade to: a release before 2.0.0

1. Check installed version

npm ls n8n

2. UPGRADE to 1.121.0

npm install n8n@">=1.121.0"

3. If no update is available yet, DOWNGRADE to a release before 2.0.0

npm view n8n versions npm install n8n@"<2.0.0"

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.

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-2026-33665?

n8n: upgrade to 1.121.0, 2.4.0. Exact commands for each OS are on this page.

Is CVE-2026-33665 being exploited?

CVE-2026-33665 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-2026-33665 affect?

CVE-2026-33665 affects n8n. Severity is high (CVSS 7.5). n8n is an open source workflow automation platform. Prior to versions 2.4.0 and 1.121.0, when LDAP authentication is enabled, n8n automatically linked an LDAP identity to an existing local account if the LDAP email attribute matched the loc

How urgent is CVE-2026-33665?

Priority 33/100. High severity

Related CVEs

CVE-2026-54309 CRITICAL 10.0 UPGRADE n8n is an open source workflow automation platform
CVE-2026-54310 CRITICAL 9.9 UPGRADE n8n is an open source workflow automation platform
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CVE-2026-44791 CRITICAL 9.9 UPGRADE n8n is an open source workflow automation platform
CVE-2026-54314 HIGH 7.5 UPGRADE n8n is an open source workflow automation platform

References

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