CVE-2026-85267
Received Received - Intake

Cross-Site WebSocket Hijacking in Google Cloud Shell

Publication date: 2026-10-20

Last updated on: 2026-10-20

Assigner: GoogleCloud

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.

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Meta Information

Published
2026-10-20
Last Modified
2026-10-20
Generated
2026-10-20
AI Q&A
2026-10-20
EPSS Evaluated
N/A
NVD
CVE-2026-85267
EUVD
EUVD-2026-104858

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Google Cloud Cloud Shell 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1385 The product uses a WebSocket, but it does not properly verify that the source of data or communication is valid.

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Executive Summary

This is a Cross-Site WebSocket Hijacking (CSWSH) vulnerability in Google Cloud Platform's Cloud Shell before July 22, 2026. It allows an unauthenticated attacker to hijack an active Cloud Shell session and steal the user's OAuth access token by exploiting a cross-origin WebSocket request.

Impact Analysis

An attacker could gain access to your Cloud Shell session and exfiltrate your OAuth access token, potentially allowing them to impersonate you or access your cloud resources without authorization.

Mitigation Strategies

No immediate action is required as the vulnerability was patched on 2026-07-22 and no customer action was needed for the fix.

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