CVE-2026-12715: Missing Authorization in Firebase Studio allows Cross-Tenant Source Code Theft

Severity: high (CVSS 8.5 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-17 · updated 2026-10-24
Weakness: CWE-862

Description

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.

Affected products

Google Cloud Firebase Studio: before 2026-04-15 — fixed in 2026-04-15

How to fix

Upgrade to a fixed version: Google Cloud Firebase Studio 2026-04-15. Check the vendor advisory for mitigations.

References

https://docs.cloud.google.com/support/bulletins#gcp-2026-043

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