---
title: "CVE-2026-85299: Google Compute Engine - Broken Access Control"
description: "Google Compute Engine < 2026-08-31 contains a missing authorization vulnerability in disks.createSnapshot and regionDisks.createSnapshot APIs, letting authenticated attackers exfiltrate cross-project disk data, exploit requires authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-85299/
---

# CVE-2026-85299 Google Compute Engine - Broken Access Control

Google Compute Engine < 2026-08-31 contains a missing authorization vulnerability in disks.createSnapshot and regionDisks.createSnapshot APIs, letting authenticated attackers exfiltrate cross-project disk data, exploit requires authentication.

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-85299)

## Details

Type

Broken Access Control

Impact

Information Disclosure

CVSS vector

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/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

Published

27 October 2026

Updated

29 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## Vendor fix

Update to version 2026-08-31 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-85299](https://nvd.nist.gov/vuln/detail/CVE-2026-85299)
- [https://docs.cloud.google.com/compute/docs/security-bulletins#gcp-2026-073](https://docs.cloud.google.com/compute/docs/security-bulletins#gcp-2026-073)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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