Missing Authorization in Compute Engine allows Cross-Project Disk Exfiltration

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-85299
StatePUBLISHED
AssignerGoogleCloud
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 10:16:56 UTC
Updated2026-10-27 10:16:56 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 8.3 HIGH from f45cbf4e-4146-4068-b7e1-655ffc2c548c

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

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
4.0f45cbf4e-4146-4068-b7e1-655ffc2c548cSecondary8.3HIGHCVSS: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/C...
4.0CNACVSS8.3HIGHCVSS: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

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
High
Sub Integrity
None
Sub Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Google Cloud Compute Engine affected 2026-08-31 date Not specified

References

ReferenceSourceLinkTags
docs.cloud.google.com/compute/docs/security-bulletins f45cbf4e-4146-4068-b7e1-655ffc2c548c docs.cloud.google.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Parsa Babadiaghakhanpour (en)

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