CVE-2026-45732 n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints
Authenticated users with read-only access can overwrite OAuth tokens, enabling data exfiltration and persistent takeover of shared integrations in n8n.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45732?
CVE-2026-45732 is a high-severity missing authorization vulnerability in N8n N8n, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
n8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, the OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate an OAuth reconnect flow and overwrite the stored token material for that credential with tokens bound to an external account they control. Workflows relying on the affected credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations. This vulnerability is fixed in 1.123.43, 2.22.1, and 2.20.7.
Weakness: CWE-639
Which versions are affected by CVE-2026-45732?
6 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 1.123.43 |
n8n npm | All versions | 1.123.43 |
n8n npm | From 2.0.0-rc.0 | 2.20.7 |
n8n npm | From 2.0.0-rc.0 | 2.20.7 |
n8n npm | From 2.21.0 | 2.21.1 |
n8n npm | From 2.21.0 | 2.21.1 |
Products include N8n N8n.
How do I fix CVE-2026-45732?
Upgrade n8n to a fixed version for your release line: 1.123.43, 2.20.7 or 2.21.1.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-45732 being exploited?
There is no known exploitation of CVE-2026-45732 in the wild and no public exploit code.
Other vulnerabilities in N8n N8n
- CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources
- CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write
- CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
- CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
- CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
Sources
Also known as GHSA-6h4j-wcr9-2vg7, MINI-qvg8-g6p3-6q7f, ROOT-APP-NPM-CVE-2026-45732.