CVE-2026-33720: n8n is an open source workflow automation platform

Routine

MEDIUM 4.2UPGRADE

CVE-2026-33720 is a medium-severity flaw (CVSS 4.2) 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 version 2.8.0, when the `N8N_SKIP_AUTH_ON_OAUTH_CALLBACK` environment variable is set to `true`, the OAuth callback handler skips ownership verification of the OAuth state parameter. This allows an attacker to trick a victim into completing an OAuth flow against a credential object the attacker controls, causing the victim's OAuth tokens to be stored in the attacker's credential. The at

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-863
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 19:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: < 2.8.0

Fixed in: 2.8.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls n8n

2. UPGRADE to 2.8.0

npm install n8n@">=2.8.0"

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-2026-33720?

n8n: upgrade to 2.8.0. Exact commands for each OS are on this page.

Is CVE-2026-33720 being exploited?

CVE-2026-33720 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-2026-33720 affect?

CVE-2026-33720 affects n8n. Severity is medium (CVSS 4.2). n8n is an open source workflow automation platform. Prior to version 2.8.0, when the `N8N_SKIP_AUTH_ON_OAUTH_CALLBACK` environment variable is set to `true`, the OAuth callback handler skips ownership verification of the OAuth state paramet

How urgent is CVE-2026-33720?

Priority 17/100. No elevated risk signals yet.

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
CVE-2026-44789 CRITICAL 9.9 UPGRADE n8n is an open source workflow automation platform
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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