Unverified50% confidenceFactExact time
Creating OAuth credentials with your own Google Cloud project means the Client ID and Client Secret are under your control, can be revoked and rotated at any time, and allow precise control over which mailboxes can pass testing.
1
Sources
50%
Confidence
Long-term
Relevance
10/18/2026
First Seen
Sources
Step-by-Step Guide to Connecting Gmail to n8n with Custom Google OAuth
youtubeNeuralVarsity10/18/2026
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Related Claims
UnverifiedGoogle usually requires email verification before login, while the OIDC implementations of some self-hosted or niche providers allow users to set any unverified email; this inconsistency in verification policies across providers gives attackers an opportunity.75% similarUnverifiedOAuth 2.0规范将权限划分为不同scope，openid仅用于身份验证，email用于读取邮箱地址，https://mail.google.com/代表完整Gmail读写权限74% similarUnverifiedTo let any user use an OAuth application, the consent screen must be published to "Production" status; if sensitive scopes such as Gmail are requested, Google's OAuth verification process must also be passed, including privacy policy and domain verification.73% similarUnverifiedWhen connecting a Google or Microsoft account, the OAuth permission flow must be completed: the user logs in in the browser and checks the permitted access scopes (such as reading mail but not sending mail), and the provider returns a revocable token to OGAD. Reading and sending are two separate sets of permissions.70% similarUnverifiedSpecific strategies to prevent the OAuth email auto-linking vulnerability include: requiring the email to be verified, separating registration from linking, using a provider + provider_user_id combined identifier, secondary confirmation, and auditing and logging.70% similar
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