CVE-2026-126385

CVSS 7.7 (high) · published 2026-11-13

n8n before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 contains a flaw in the OAuth2 credential callback of the dynamic-credential connect flow, which does not verify that the completing browser belongs to the user who started the flow. Members with access to a resolvable OAuth2 credential can send the provider authorization URL to a victim; if the victim consents without an active n8n session, the victim's tokens are stored under the member's identity, letting the member's workflows act as the victim.

Weakness: CWE-306

Source: NVD CVE-2026-126385

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-426f-xmcv-g8pg
• https://www.vulncheck.com/advisories/n8n-before-2.46.1-oauth-account-hijack-via-unauthenticated-credential-callback

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