CVE-2026-85267
Cross-Site WebSocket Hijacking in Google Cloud Shell
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 20, 2026
- Updated
- Oct 20, 2026
- Reserved
- Sep 3, 2026
Description
A Cross-Site WebSocket Hijacking vulnerability in Cloud Shell prior to 2026-07-22 on Google Cloud Platform allows an unauthenticated attacker to hijack an active Cloud Shell session and exfiltrate the user's OAuth access token using a cross-origin WebSocket request.
This vulnerability was patched on 22 July 2026, and no customer action is needed.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/U:Clear | GoogleCloud |
Weaknesses
- CWE-1385 Missing Origin Validation in WebSockets
Affected Products
| Product | Versions |
|---|---|
Cloud ShellGoogle Cloud |
|
References
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