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AII-1001-02801
ReportedReported by fewer than three independent publishers, with no official finding.

Open-source AI models found vulnerable to criminal misuse, researchers warn

Researchers at SentinelOne and Censys reported finding thousands of internet-accessible open-source AI models, particularly Meta's Llama and Google DeepMind's Gemma, with removed safety guardrails that could be exploited for criminal activities including spam, phishing, fraud, and disinformation campaigns.

29 January 2026 Β· Security and cyberattacks
29 January 2026
AII-1001-028012 sources ↓
Quick facts
Category
Security and cyberattacks
Country
United States
Source
Reuters
Date
29 January 2026
Drafted by
Raidu Incident Detection

What happened

Cybersecurity researchers SentinelOne and Censys conducted a 293-day study of publicly accessible open-source large language model deployments. They found thousands of computers running open-source LLM variants, particularly Meta's Llama and Google DeepMind's Gemma, could be exploited by hackers and criminals.

Researchers identified hundreds of instances where safety guardrails were explicitly removed from models. Of system prompts examined in roughly a quarter of the observed LLMs, 7.5% could potentially enable harmful activity.

Reported impact

Hackers could target computers running these LLMs to conduct spam operations, phishing content creation, and disinformation campaigns while evading platform security protocols. Researchers documented potential use cases including hacking, hate speech, harassment, violent content, personal data theft, scams, fraud, and child sexual abuse material.

Index analysis

The research analysed publicly accessible deployments of open-source LLMs deployed through Ollama, a tool allowing people and organizations to run their own versions of various large language models.

Juan Andres Guerrero-Saade, executive director for intelligence and security research at SentinelOne, described the situation as an 'iceberg' not being properly accounted for across the industry and open-source community, noting that 'surplus capacity is clearly being utilised for all kinds of different stuff, some of it legitimate, some obviously criminal.'

Governance controls

While some open-source models include guardrails, the identified removal of these safety features in hundreds of instances highlights a gap in industry oversight and security controls.

Classification

Category
Security and cyberattacks
Industry
Digital security
Country
United States
Harm status
Potential harm
Intent
Unknown
Timing
Post-deployment
Harm types
Economic or property, Public interest, Other
Harmed
General public, Business
Failure modes
Jailbreak
Consequences
None recorded
AI systems
Llama, Gemma

Sources and evidence

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

Reuters
Open-source AI models vulnerable to criminal misuse, researchers warn
29 January 2026
Republic World
Open-Source AI Models, Including Meta's Llama, May be Vulnerable to Criminal Misuse, Warn Researchers
29 January 2026