CVE-2026-85299 PUBLISHED

Missing Authorization in Compute Engine allows Cross-Project Disk Exfiltration

Assigner: GoogleCloud
Reserved: 03.09.2026 Published: 27.10.2026 Updated: 27.10.2026

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.

Metrics

CVSS 4.0

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/U:Clear
CVSS Score: 8.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Google Cloud
Product	Compute Engine
Versions	Default: unaffected affected from 0 to 2026-08-31 (excl.)

Credits

Parsa Babadiaghakhanpour reporter

References

https://docs.cloud.google.com/compute/docs/security-bulletins#gcp-2026-073

Problem Types

CWE-862 Missing Authorization CWE

Impacts

CAPEC-122 (CAPEC-122 Privilege Abuse)