Vulnerability · Published Jun 23, 2026 · Assigned by GitHub_M
CVE-2026-45732n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints
High 8.3
In plain English
A high-severity authorization bypass via user-controlled key in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | n8n | 1.123.43 | GHSA-6h4j-wcr9-2vg7 |
| npm | n8n | 2.21.1 | GHSA-6h4j-wcr9-2vg7 |
| npm | n8n | 2.20.7 | GHSA-6h4j-wcr9-2vg7 |
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4j-wcr9-2vg7 x_refsource_CONFIRM