---
id: CVE-2026-85299
title: Missing Authorization in Compute Engine allows Cross-Project Disk Exfiltration
summary: >-
  A Missing Authorization vulnerability in the disks.createSnapshot and
  regionDisks.createSnapshot APIs in Google Compute Engine versions prior to
  2026-08-31 on Google Cloud Platform allows an authenticated attacker to
  exfiltrate cross-pro…
severity: high
cvss: 8.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/U:Clear'
cvssSource: cna
cwe:
  - CWE-862
vendor: Google Cloud
product: Compute Engine
affected:
  - compute_engine < 2026-08-31
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T09:02:32.461Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-85299'
references:
  - url: 'https://docs.cloud.google.com/compute/docs/security-bulletins#gcp-2026-073'
tags:
  - cve.org
epss: 0.00351
epssPercentile: 0.28527
ingestedAt: '2026-10-27T16:11:59.252Z'
---

## Overview

A Missing Authorization vulnerability in the disks.createSnapshot and regionDisks.createSnapshot APIs in Google Compute Engine versions prior to 2026-08-31 on Google Cloud Platform allows an authenticated attacker to exfiltrate cross-project disk data.


This vulnerability was patched on 31 August 2026, and no customer action is needed.

## Affected

- `compute_engine < 2026-08-31`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.