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AII-1000-65703
ReportedReported by fewer than three independent publishers, with no official finding.

Google Vertex AI Agents Vulnerable to Exploitation via Default Permissions

Security researchers identified a vulnerability in Google Cloud's Vertex AI Agent Engine where default permission configurations allowed attackers to compromise deployed AI agents, potentially exfiltrating customer data and accessing proprietary code. Google issued guidance recommending customers use their own service accounts instead of defaults to mitigate the risk.

31 March 2026 Β· Google Β· Security and cyberattacks
31 March 2026
AII-1000-657032 sources ↓
Quick facts
Category
Security and cyberattacks
Country
United States
Source
IT Security News - cybersecurity, infosecurity news
Date
31 March 2026
Drafted by
Raidu Incident Detection

What happened

Security researchers discovered that Google Cloud Platform's Vertex AI Agent Engine contained a vulnerability allowing attackers to exploit default permission scoping to weaponize deployed AI agents.

Attackers could turn AI agents into 'double agents' that exfiltrate data and compromise cloud infrastructure.

Reported impact

Customer data and proprietary Google code were exposed through the vulnerability.

Excessive default permissions allowed attackers to pivot and access Cloud Storage.

Index analysis

The vulnerability stems from over-privileged default service account configurations in Vertex AI agents.

Cloud misconfigurations in AI agent deployment created an attack surface for threat actors.

Governance controls

Google updated documentation to urge customers to use Bring Your Own Service Account (BYOSA) instead of default service accounts.

Classification

Category
Security and cyberattacks
Industry
IT infrastructure and hosting
Country
United States
Harm status
Potential harm
Intent
Unintentional
Timing
Post-deployment
Harm types
Economic or property, Other
Harmed
Business
Failure modes
Unsafe autonomous behaviour, Data leak
AI systems
Vertex AI Agent Engine

Sources and evidence

This record was researched and written by the Index, based on the following original reporting.

IT Security News - cybersecurity, infosecurity news
Google Cloud's Vertex AI platform Vulnerability Allow Attackers to Access Sensitive Data - IT Security News
1 April 2026
TechRadar
'What if the AI agent you just deployed was secretly working against you?': Vertex AI 'double agent' flaw exposes customer data and Google's internal code
1 April 2026