Google Gemini Prompt Injection Flaw Exposed Private Calendar Data via Malicious Invites
Google Gemini Prompt Injection Flaw Exposed Private Calendar Data via Malicious Invites
19 January 2026
Cybersecurity researchers have disclosed details of a security flaw that leverages indirect prompt injection targeting Google Gemini as a way to bypass authorization guardrails and use Google Calendar as a data extraction mechanism.
The vulnerability, Miggo Security's Head of Research, Liad Eliyahu, said, made it possible to circumvent Google Calendar's privacy controls by hiding a dormant