CVE-2026-12715
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMissing 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is a missing authorization vulnerability in Google Cloud Firebase Studio that allowed attackers to make unauthorized GCS (Google Cloud Storage) URL signing requests, enabling them to download other users' deployed source code and access sensitive data stored in those buckets.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- Authentication
- X
- User interaction
- None
- Scope
- X
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Clear
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Firebase Studio service is receiving Google Cloud updatesContact Google Cloud support or check the Firebase Studio admin console to verify the service has received the April 15, 2026 security patchAffected if The service has not received the server-side patch from Google Cloud
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Review GCS URL signing logs for unauthorized requestsExamine Firebase Studio and Google Cloud Logging for GCS signed URL generation requests, looking for patterns where signed URLs were created for storage buckets belonging to different user identitiesAffected if Signed URLs were generated for storage buckets outside the authenticated user's scope
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Check for unexpected storage bucket access patternsAnalyze GCS access logs for signed URLs being used to access storage buckets or objects that do not correspond to the legitimate user's deployed applicationsAffected if Storage access occurred via signed URLs for buckets not owned by the requesting user identity
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Verify Firebase Studio authentication is functioningAuthorization checks are missing or bypassed on GCS URL signing endpoint requests
A user is affected if their Firebase Studio instances show signs of unauthorized storage bucket access or if the service has not received Google's server-side patch applied on April 15, 2026.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedNo customer action required. Google patched this vulnerability on 15 April 2026, and the fix was automatically applied to all Firebase Studio instances.
- This vulnerability was patched by Google on April 15, 2026.
- No customer action is required as the fix was applied server-side by Google Cloud.
- Google Cloud handles the authorization fix automatically for all Firebase Studio users.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-12715 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-12715 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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