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AII-1001-09123
ReportedReported by fewer than three independent publishers, with no official finding.Supporting sources are pending verification.

Prompt injection vulnerability discovered in Google Gemini G-Suite integration

A prompt injection vulnerability was discovered in Google Gemini when integrated with G-Suite applications including email. The flaw allows attackers to send specially crafted emails that, when summarized by Gemini, return manipulated responses appearing to come from legitimate sources.

19 February 2026 Β· Google Β· Security and cyberattacks
19 February 2026
AII-1001-09123
Quick facts
Organization
Google (subject)
Category
Security and cyberattacks
Country
United States
Date
19 February 2026
Drafted by
Raidu Incident Detection

What happened

A prompt injection vulnerability was discovered affecting Google Gemini across G-Suite applications such as email.

An attacker can send an email containing a prompt injection to a victim, and when the victim requests Gemini to summarize their unread emails, they receive a manipulated response that appears to be legitimate and originating from Gemini itself.

Reported impact

The vulnerability has a moderate social impact, potentially involving misinformation or low-stakes safety risks, which could mislead users.

The flaw could lead to leakage of private personal data such as cell phone numbers, potentially prompting policy review and regulatory concern.

Index analysis

This involves deceptive formattingβ€”a prompt injection designed to fabricate the appearance of system instructions or other sources of input a guard-railed AI system might expect, causing it to behave in insecure ways based on the fabricated context from an adversarially formatted user prompt.

The technique employs meta prompting to manipulate the prompting process itself to influence the model's behavior and responses through higher-level prompting strategies.

Classification

Organization
Google (subject)
Category
Security and cyberattacks
Industry
Business processes and support services
Country
United States
Harm status
Potential harm
Intent
Unknown
Timing
Post-deployment
Harmed
Consumers
Failure modes
Manipulation or dark pattern, Prompt injection
AI systems
Gemini

Sources and evidence

Sources not yet published

This record was researched and written by the Index from original reporting. Its sources are still being verified by an editor, and they are listed here once that check is complete. Until then the record carries no reviewer.

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