CVE-2026-85267
8.7HighPublished 20 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Passive
- Impact
- Full C/I/A compromise
- Weakness
- CWE-1385
Impact
Remote attackers can hijack an active Cloud Shell session and steal the victim's OAuth access token. To exploit it, the attacker needs the victim to visit a malicious website while their Cloud Shell is running.
Root cause
Cloud Shell failed to properly validate origins on incoming WebSocket connections, enabling Cross-Site WebSocket Hijacking.
Affected systems
Google Cloud Platform Cloud Shell prior to 2026-07-22.
CVSS v4.0 · 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Clear
Fix & remediation
No customer action required; Google deployed the fix on the server side on 2026-07-22.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD 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.