CVE-2026-73655 in Trigger.dev
Summary
by MITRE • 08/13/2026
Trigger.dev is a platform for building and deploying fully managed AI agents and workflows. Prior to 4.5.2, addGoogleStrategy() in apps/webapp/app/services/googleAuth.server.ts passes a Google profile email to findOrCreateGoogleUser() in apps/webapp/app/models/user.server.ts without requiring Google's email_verified assertion. When existingEmailUser && !existingUser is true, the flow writes the new Google authIdentifier into the existing email-matched account and returns that user object, allowing an attacker-controlled Google profile with an unverified matching email to take over the account. This issue is fixed in version 4.5.2.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability exists within Trigger.dev's authentication system where the addGoogleStrategy function fails to validate email verification status from Google profiles before associating them with existing user accounts. The flaw occurs in the apps/webapp/app/services/googleAuth.server.ts file where the Google profile email is passed directly to findOrCreateGoogleUser function in apps/webapp/app/models/user.server.ts without first verifying that Google has confirmed the email address ownership through its email_verified assertion.
The technical implementation creates a critical security gap where an attacker can exploit the lack of verification by creating or controlling a Google account with an email address that matches an existing Trigger.dev user. When the system encounters an existing user account with a matching email address but no associated Google authentication, it proceeds to link the attacker-controlled Google profile to that account. This occurs because the code path evaluates existingEmailUser && !existingUser as true, allowing unauthorized access through social login mechanisms.
The operational impact of this vulnerability enables account takeover attacks where malicious actors can compromise legitimate user accounts by simply registering a Google account with the same email address. This represents a classic case of insufficient authentication validation that violates security best practices for identity management systems. The vulnerability allows attackers to gain unauthorized access to user data, potentially leading to data breaches, unauthorized actions within the platform, and compromised user privacy.
This issue maps directly to CWE-305 Authentication Bypass Through User Identification Error, which specifically addresses scenarios where authentication systems fail to properly validate user identification information. The vulnerability also aligns with ATT&CK technique T1078 Valid Accounts, as it enables adversaries to leverage legitimate user credentials through compromised email associations. Additionally, it demonstrates poor input validation practices that could be classified under CWE-20 Improper Input Validation, particularly in the authentication flow handling.
The fix implemented in version 4.5.2 requires verification of Google's email_verified assertion before proceeding with account association operations. This ensures that only Google profiles with confirmed email ownership can be linked to existing accounts, preventing unauthorized takeover attempts. Organizations using Trigger.dev should immediately upgrade to version 4.5.2 or later and consider implementing additional monitoring for suspicious authentication patterns. The mitigation strategy should include validating all external identity provider assertions and implementing proper account recovery mechanisms to protect against potential exploitation attempts.