CVE-2026-33720
n8n is an open source workflow automation platform.
Published Mar 25, 2026 · updated Jun 17, 2026 · n8n n8n
n8n is an open source workflow automation platform. Prior to version 2.8.0, when the environment variable is set to , 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 attacker can then use those tokens to execute workflows in their name. This issue only affects instances where is explicitly configured (non-default). The issue has been fixed in n8n version 2.8.0. Users should upgrade to this version or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Avoid enabling unless strictly required, and/ or restrict access to the n8n instance to fully trusted users only. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Mar 25, 2026 · NIST NVD
Detected
n8n is an open source workflow automation platform. Prior to version 2.8.0, when the environment variable is set to , 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 credenti
Jun 17, 2026 · NIST NVD
Updated
n8n is an open source workflow automation platform. Prior to version 2.8.0, when the environment variable is set to , 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 credenti
Affected
- cpe n8n/n8nversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-33720
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-33720
n8n is an open source workflow automation platform. Prior to version 2.8.0, when the environment variable is set to , the OAuth callback handler skips ownership verification of the OAuth state parameter. This allows an attacker to trick a v
nvd.nist.gov