US-based AI developer Anthropic has unveiled a new language model called Claude Mythos Preview, which, according to the company, is capable of indepconcludeently finding and exploiting security vulnerabilities in software. The model is declared to surpass the capabilities of all but the best human security experts. Due to its threat potential, Anthropic does not plan a general public release.
As previously reported, developments around Mythos became known recently following a leak. Prior to this, Anthropic had already sent shares of cybersecurity companies into a tailspin with the release of Claude Code Security. The news about Mythos — where companies such as Palo Alto Networks, CrowdStrike, CloudFlare, Cisco, and Broadcom are partners via “Project Glasswing” — partially boosted their stocks on Tuesday.
Why Mythos is not intconcludeed to be publicly available
Anthropic justifies the decision against a public release with the model’s extraordinary capabilities. According to the company, Claude Mythos Preview can identify security vulnerabilities and develop exploits almost entirely autonomously, without human guidance. The concern: should such capabilities fall uncontrolled into the hands of actors who are not committed to responsible utilize, the consequences for the economy, public safety, and national security could be severe.
In the long term, Anthropic aims to create models of this performance class available safely and at scale. However, appropriate safeguards must first be developed that can detect and block dangerous outputs. These security mechanisms are to be tested initially with a less risky model — an upcoming Claude Opus model.
Vulnerabilities found: Decades-old flaws in critical systems
As part of internal testing, Anthropic deployed Claude Mythos Preview to identify so-called zero-day vulnerabilities — security flaws that were previously unknown to the respective developers. According to the company, thousands of critical vulnerabilities were discovered across all major operating systems and web browsers. Three specific examples were created public:
- A 27-year-old vulnerability in OpenBSD, an operating system considered particularly secure and frequently utilized for firewalls and critical infrastructure. The flaw created it possible to crash any affected machine simply via a network connection.
- A 16-year-old vulnerability in FFmpeg, a widely utilized library for video processing. Particularly noteworthy: automated testing tools had already executed the relevant line of code five million times without detecting the issue.
- Multiple interconnected vulnerabilities in the Linux kernel, the operating system core that powers the majority of the world’s servers. By combining these flaws, an attacker could escalate from simple utilizer access to full control over a machine.
All of the vulnerabilities mentioned were reported to the respective software maintainers and have since been patched. For additional discovered flaws, Anthropic has initially published only a cryptographic hash of the details and intconcludes to disclose the full information only after a repair has been applied.
Project Glasswing: Defensive utilize by selected partners
To deploy the model’s capabilities specifically for defensive purposes, Anthropic has launched the initiative Project Glasswing. The goal is to utilize Claude Mythos Preview in the context of defensive security work and to share the insights gained with the entire industest.
The founding partners include prominent companies from technology, finance, and cybersecurity:
- Amazon Web Services
- Anthropic
- Apple
- Broadcom
- Cisco
- CrowdStrike
- JPMorganChase
- Linux Foundation
- Microsoft
- NVIDIA
- Palo Alto Networks
In addition, more than 40 further organizations that develop or operate critical software infrastructure will be granted access to the model. They are intconcludeed to utilize it to audit and secure both their own and open-source systems for vulnerabilities.
Financial commitments and outview
Anthropic is creating up to $100 million in usage credits for Claude Mythos Preview available for Project Glasswing. An additional $4 million will be awarded as direct grants to open-source security organizations.
“The work of defconcludeing the world’s cyber infrastructure could take years; the capabilities of frontier AI will likely advance significantly over the coming months. For cyber defconcludeers to maintain the upper hand, we must act now,” reads a statement from the company.
Anthropic emphasizes that Project Glasswing is only a starting point. No single organization can solve cybersecurity problems alone. Frontier AI developers, software companies, security researchers, open-source developers, and governments worldwide are called upon to act toreceiveher.
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