CVE-2026-12715 in Firebase Studio
Summary
by MITRE • 07/17/2026
Missing Authorization in Google Cloud Firebase Studio versions prior to 2026-04-15 on Google Cloud Platform allows an attacker to download other users' deployed source code and access sensitive data via unauthorized GCS URL signing requests.
This vulnerability was patched on 15 April 2026, and no customer action is needed.
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Analysis
by VulDB Data Team • 07/17/2026
This vulnerability represents a critical authorization bypass in Google Cloud Firebase Studio affecting versions prior to the 2026-04-15 patch release. The flaw allowed attackers to exploit improper access controls within the Firebase Studio environment, specifically targeting the Google Cloud Storage integration that handles source code deployment operations. The vulnerability stemmed from insufficient validation of user permissions when processing GCS URL signing requests, enabling unauthorized access to deployed applications and their underlying source code repositories.
The technical implementation of this flaw involved a missing authorization check during the GCS URL signing process within Firebase Studio's backend services. Attackers could craft malicious requests that bypassed normal permission validation mechanisms, allowing them to generate signed URLs for Google Cloud Storage buckets containing other users' deployed applications. This unauthorized access pattern aligns with CWE-285, which addresses improper authorization in software systems, and specifically demonstrates a weakness in access control enforcement during cloud storage operations.
The operational impact of this vulnerability was significant across multiple threat vectors within the Google Cloud Platform ecosystem. Attackers could potentially access sensitive source code repositories containing proprietary business logic, configuration files, and application dependencies that might include hardcoded credentials or API keys. The vulnerability also posed risks to data integrity and confidentiality, as unauthorized access to deployed applications could lead to information disclosure, potential code tampering, or further exploitation of interconnected services within the same project environments.
This vulnerability was addressed through a comprehensive security patch released on April 15, 2026, which strengthened authorization controls in Firebase Studio's interaction with Google Cloud Storage services. The patch implemented proper access control validation for all GCS URL signing requests and reinforced the principle of least privilege enforcement within the platform's service architecture. Organizations using Google Cloud Firebase Studio do not require any remediation actions as the fix was automatically applied to all affected versions, though security monitoring should continue to verify proper authorization enforcement.
The incident highlights the importance of continuous security validation in cloud-native environments where multiple services interact through shared infrastructure components. The vulnerability demonstrates how access control failures in one service component can create cascading security risks across interconnected systems, emphasizing the need for comprehensive security testing and regular vulnerability assessments. This particular flaw aligns with ATT&CK technique T1566 which covers credential harvesting through various attack vectors including unauthorized access to cloud storage resources, and represents a critical area where proper authorization enforcement should be maintained throughout the entire service stack.