GCD AI RADAR
incidents/AIR-2025-0053

Google Bard Conversation Exfiltration via Indirect Prompt Injection

Attack on AI1 Research / proof of conceptPrompt injectionData leak

Researchers demonstrated an indirect prompt injection attack against Google Bard that exfiltrated user conversations. Malicious documents shared with users forced Bard to render an image containing embedded conversation data sent to an attacker server.

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.
  • Data leak
    Training data, chat logs, system prompts, model weights or other AI-system data exposed.
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
products
Google Bard
incident date
23 Nov 2023
first reported
22 Apr 2025
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
indirect-prompt-injection · data-exfiltration · bard
record
created 2026-10-18 06:55Z · updated 2026-10-18 06:55Z · json

Sources · 2

  1. 2025-04-22
    Google Bard Conversation Exfiltration
    MITRE ATLAS · atlas.mitre.org/studies/AML.CS0029
  2. 2025-04-22
    Hacking Google Bard - From Prompt Injection to Data Exfiltration
    Embrace The Red · embracethered.com/blog/posts/2023/google-bard-data-exfiltration

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