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AII-1001-09683
ReportedReported by fewer than three independent publishers, with no official finding.

Researcher demonstrates prompt injection to manipulate ChatGPT and Google AI chatbots

A researcher publicly demonstrated that AI chatbots from OpenAI and Google can be manipulated via simple prompt injection techniques to spread misinformation. The researcher created a false claim about himself that multiple AI systems then repeated to other users, and reportedly found dozens of real-world examples where the technique is being used to promote businesses and spread false information at scale.

19 February 2026 · OpenAI · Security and cyberattacks
19 February 2026
AII-1001-096832 sources ↓
Quick facts
Category
Security and cyberattacks
Country
United States
Source
BBC
Date
19 February 2026
Drafted by
Raidu Incident Detection

What happened

A researcher demonstrated that ChatGPT, Google's Gemini, and Google's AI search tools can be manipulated to spread false information through crafted online posts. The researcher created a blog post that caused these AI systems to tell users he was exceptional at eating hot dogs, a false claim used to illustrate the vulnerability.

The technique exploits weaknesses in the built-in systems of chatbots by inserting well-crafted text into internet content. The method is simple enough that a child could perform it, and effectiveness can be increased with additional effort.

Reported impact

The researcher found dozens of examples where AI tools are being coerced to promote businesses and spread misinformation at what appears to be large scale. Biased information could lead people to make poor decisions on serious matters including voting, selecting service providers, and medical issues.

Index analysis

The vulnerability exploits shared weaknesses across most AI chatbot systems. According to Lily Ray, vice president of strategy and research for search engine optimization, it is easier to deceive AI chatbots than it was to deceive Google search two or three years ago.

Classification

Category
Security and cyberattacks
Industry
Healthcare, drugs and biotechnology
Country
United States
Harm status
Potential harm
Intent
Intentional
Timing
Post-deployment
Harm types
Public interest, Economic or property, Psychological
Harmed
General public, Consumers
Failure modes
Prompt injection, Hallucination, Manipulation or dark pattern
AI systems
ChatGPT, Google Gemini, Google AI search tools

Sources and evidence

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

BBC
Hackeé ChatGPT y la IA de Google en 20 minutos (y qué logré demostrar con eso) - BBC News Mundo
19 February 2026
La Nacion
La nueva era del spam: por qué es tan fácil engañar a la inteligencia artificial
19 February 2026