Cross-Site WebSocket Hijacking in Google Cloud Shell by Google
CVE-2026-85267

8.7HIGH

Key Information:

Vendor

Google Cloud

Status
Cloud Shell
Vendor
CVE Published:
20 October 2026

What is CVE-2026-85267?

A Cross-Site WebSocket Hijacking vulnerability in Google Cloud Shell prior to July 22, 2026, could allow an unauthenticated attacker to hijack an active session. This attack could lead to the exfiltration of the user's OAuth access token through malicious cross-origin WebSocket requests. Google has addressed this issue in a patch released on July 22, 2026, and users are not required to take any action to mitigate this vulnerability.

Affected Version(s)

Cloud Shell 0 < 2026-07-22

References

https://docs.cloud.google.com/shell/docs/release-notes#Ju...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Elad Beber
.