Mythos, an artificial intelligence (AI) model created by Anthropic, the firm behind the Claude chatbot, has reportedly found flaws inside Apple’s (AAPL) highly secured macOS system. This was announced by researchers from Calif, a security firm based in Palo Alto, after testing the AI model’s skills against macOS.
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These researchers bypassed Apple’s security system, one of the toughest to crack in the tech industry, by combining two software bugs with other attack methods. This update raises concerns about how advanced AI models could increase cybersecurity risks and how quickly these flaws could be discovered.
Anthropic’s Mythos Helps Discover New macOS Exploit
Security researchers recently put Apple’s macOS to the test, exposing weaknesses in the software through a tactic known as a “privilege escalation exploit.” This method allows hackers to gain deeper access to a computer system by combining multiple attack methods.
The researchers said the exploit worked by deliberately corrupting parts of the Mac’s memory system. This allowed them to gain access to areas of the device that are normally off-limits.
What makes the findings even more interesting is that, with the help of Anthropic’s Mythos, the technique managed to bypass Apple’s Memory Integrity Enforcement (MIE). This is a major security feature that the tech giant had been building for years and launched in 2025. MIE was built to reduce the risk of these kinds of threats, making it all the more surprising that researchers were able to get around it.
Even more troubling, the researchers managed to build code capable of exploiting these weaknesses within five days. This was done using the Mythos AI model alongside human cybersecurity expertise.
Thai Duong, the CEO of Calif, said Mythos did not create entirely new attack methods on its own, but was very effective at reproducing and combining known exploit methods in useful ways. Meanwhile, cybersecurity researcher Michał Zalewski said the findings were notable because Apple’s macOS protections are considered among the strongest in the industry.
Growing AI Security Concerns Trigger “Bugmageddon” Warnings
Cybersecurity experts have recently warned about a potential “Bugmageddon,” referring to a possible surge in bug attacks using advanced, capable AI systems. This has added to growing concerns about how advanced AI systems could increase the speed at which software weaknesses are found.
Earlier this year, Anthropic said one of its AI systems discovered more than 100 bugs in the Firefox browser. The private company claimed that the process, which would normally take researchers months, was done in two weeks. Earlier in April, the model had also found thousands of flaws in Microsoft (MSFT) and Palo Alto Networks (PANW).
Given the severity of the risks, Apple said it will review Calif’s findings and validate the reported bugs. The firm noted that security remains a top priority and that it takes reports of potential vulnerabilities very seriously.
The researchers have now traveled directly to Apple’s headquarters in Cupertino to present a detailed 55-page report on the bugs and how they were discovered. However, the report has not been publicly released, as researchers said they plan to wait until Apple fixes the issues first.
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