dbcve.org
Missing AuthorizationWeakness · CWE-862

CVE-2026-8934

MEDIUM · 6.9 CVSS v4.0 Published 2026-06-22
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
A Missing Authorization vulnerability in a GraphQL private API operation of the Google App Engine section of the Cloud Console allows an unauthenticated remote attacker to leak sensitive App Engine request logs from other projects using a specially crafted request. This vulnerability was patched on 7 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 confidence

This is a Missing Authorization vulnerability in the GraphQL private API for Google App Engine within Cloud Console. An unauthenticated attacker can send specially crafted requests to leak sensitive App Engine request logs from other projects, bypassing proper access controls on the private API operation.

MitigationNo customer action required; Google patched this vulnerability on 7 April 2026. Organizations may optionally conduct a review to verify the fix and assess for similar authorization gaps in their Google Cloud configurations.

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
None
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Review Cloud Audit Logs for unauthorized App Engine GraphQL API access
    Examine Google Cloud Cloud Logging for entries involving the App Engine private GraphQL API. Filter for API calls from unauthenticated or unexpected principals accessing log retrieval operations.
    Affected if Logs show API calls to the App Engine GraphQL private endpoint from unauthenticated sources or cross-project principals that should not have access
  2. Check IAM policy for App Engine Log Viewer permissions
    Review IAM policies on your Google Cloud projects to identify which principals have roles like 'App Engine Log Viewer' or custom roles with log access. Use 'gcloud projects get-iam-policy' or the Cloud Console IAM page.
    Affected if Users or service accounts outside your project organization have been granted log access permissions unexpectedly
  3. Verify cross-project log access attempts in VPC Service Controls
    If VPC Service Controls are enabled, review perimeter logs for attempts to access App Engine logs from outside the trusted perimeter using the private API.
    Affected if VPC SC perimeter logs show successful cross-perimeter access to App Engine log resources that should be restricted
  4. Search for anomalous App Engine log export operations
    Review Cloud Logging filters for 'appengine.googleapis.com' resource types with log read operations. Look for patterns indicating bulk log exfiltration or queries for logs outside the expected time range or project scope.
    Affected if Log queries retrieve App Engine request logs from projects the principal does not own or have legitimate access to

A user is likely affected if Cloud Audit Logs or IAM configurations show unauthorized cross-project access to App Engine request logs via the private GraphQL API since before the 7 April 2026 patch date.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

No customer action required; Google patched this vulnerability on 7 April 2026. Organizations may optionally conduct a review to verify the fix and assess for similar authorization gaps in their Google Cloud configurations.

Recommended fix High confidence
  1. No customer action required. Google has already patched this vulnerability server-side.

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Testing1.0 h
  • Review / QA2.0 h
5.0 hours of engineering $910
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-8934 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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