GCD AI RADAR
incidents/AIR-2026-0361

Prompt-Based Attacks Against Gemini via Calendar Invitations

Attack on AI1 Research / proof of conceptPrompt injectionAgent hijack

Researchers demonstrated how malicious instructions embedded in Google Calendar invitations and shared files could influence Gemini assistants during retrieval. The indirect prompt injection caused the model to misuse authorized tools.

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Prompt injectionprimary
    Untrusted content (web pages, documents, emails, tool output) steers a model into ignoring its instructions.
  • Agent hijack
    An AI agent is tricked into unauthorized actions: tool misuse, data exfiltration through the agent, or acting against its principal.
owasp llm top 10
mitre atlas
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
1 · Research / proof of concept
Demonstrated by researchers; no known real-world exploitation.
targets
Google, Enterprise deployment
products
Gemini
incident date
6 Aug 2025
first reported
31 Jul 2026
origin
MITRE ATLAS
Derived from MITRE ATLAS (Apache 2.0, © MITRE).
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
gemini · indirect-prompt-injection · calendar
record
created 2026-10-18 06:55Z · updated 2026-10-18 06:55Z · json

Sources · 2

  1. 2026-07-31
    Prompt-Based Attacks Against Gemini via Calendar Invitations
    MITRE ATLAS · atlas.mitre.org/studies/AML.CS0063
  2. 2026-07-31
    Invitation Is All You Need: Hacking Gemini
    safebreach.com · safebreach.com/blog/invitation-is-all-you-need-hacking-gemini

Titles and links belong to their publishers. The summary above is written by GCD AI RADAR in its own words; data is CC BY-SA 4.0.

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