2024-07-30: Users cannot complete OAuth sign up

Customer Impact

Some users trying to sign up to GitLab.com using OAuth SSO (e.g. Google) will receive an email with message "Complete verification to sign up." and a verification code. The redirect link from the email presents an empty page, where users cannot enter the verification code to proceed.

Current Status

We identified the addition of Arkose email intelligence as the root cause. The MR is being reverted, and is waiting to be deployed to production.

📚 References and helpful links

Recent Events (available internally only):

• Feature Flag Log - Chatops to toggle Feature Flags Documentation
• Infrastructure Configurations
• GCP Events (e.g. host failure)

Deployment Guidance

• Deployments Log | Gitlab.com Latest Updates
• Reach out to Release Managers for S1/S2 incidents to discuss Rollbacks, Hot Patching or speeding up deployments. | Rollback Runbook | Hot Patch Runbook

Use the following links to create related issues to this incident if additional work needs to be completed after it is resolved:

• Corrective action ❙ Infradev
• Incident Review ❙ Infra investigation followup
• Confidential Support contact ❙ QA investigation

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Security Note: If anything abnormal is found during the course of your investigation, please do not hesitate to contact security.