Top AIs invent same fake PyPl and npm package names

Research reveals that slopsquatting remains a threat to developers using AI to aid coding. Enterprise software developers continue to be in danger of falling victim to slopsquatting, where AI coding tools hallucinate the existence of nonexistent libraries and hackers create malicious packages in response. The top AI coding tools are remarkably consistent in their hallucinations: Researcher Aleksandr Churilov found the same 127 fake package names generated by five different LLMs. Slopsquatting is a relatively new form of malware attack that involves the creation of malicious packages in response to the hallucinations of AI coding tools, causing the malicious packages to be incorporated into legitimate applications. Churilov set out his findings in a research paper, The Range Shrinks, the Threat Remains: Re-evaluating LLM Package Hallucinations on the 2026 Frontier-Model Cohort, which is yet to be peer-reviewed. He found 127 hallucinated package names were shared across Claude Sonnet 4.6, Claude Haiku 4.5, GPT-5.4-mini, Gemini 2.5 Pro, and DeepSeek V3.2. As of April this year, 53 of those names — 41 on the PyPI software repository and 12 on npm —are still available for registration. According to the study, there are two reasons for this amount of conformity in the output of the models. First, models may learn the same incorrect package references from shared public training material, such as tutorials and documentation. Second, they may independently extrapolate plausible names from ecosystem conventions. In this way, they could produce names that look correct, even if they don’t actually exist. While Churilov’s research will worry CISOs and security-conscious developers, there is some relief. The research has not yet found any evidence that any of the remaining 53 names have been registered maliciously, nor used in an attack. Maxwell began writing about technology in 1984, when mainframes ruled the world. Since then he has written for just about every business computing title in the UK, and for a few in the US, covering everything from Artificial intelligence to Zero-day exploits and all points in between. He has also been editor-in-chief of several award-winning titles, including Network Week, Techworld, and Cloud Pro, and a regular contributor to Whatsonstage.com. In his spare time he coaches a junior rugby team. More from this author OpenAI’s new hardware is a $230, 13-switch keyboard for Codex Jul 17, 2026 2 minsAI OK in Linux development, says Torvalds Jul 17, 2026 2 minsCrowdStrike identifies five new AI prompt injection threats Jul 10, 2026 2 minsMistral joins rush to develop AI for robots Jul 10, 2026 2 minsAI token prices are cooling — but why? Jul 3, 2026 2 minsUS tells OpenAI to restrict access to its most powerful AI model Jun 26, 2026 2 minsSolving an ARD problem in AI: Agentic Resource Discovery Jun 19, 2026 2 minsOpenAI gets the attention it needs from AI researcher Noam Shazeer Jun 19, 2026 2 mins Show me more