Anthropic Mythos: Security Risks, Elite Access, and Skepticism

Anthropic claims Mythos is so powerful that a public release could cause severe economic fallout and threaten national security. Critics argue this repeats a familiar “scare the slop out of people” playbook, yet reports of existential dread continue despite the model remaining unavailable. The company’s bold language includes the line, “Mythos is basically a zero‑day vending machine.”

Security Vulnerabilities Identified by Mythos

Mythos uncovered a 16‑year‑old memory‑corruption bug in FFmpeg that lets a malicious video file write outside allowed memory, crashing the decoder and corrupting data. It also exposed a 27‑year‑old OpenBSD flaw that triggers a null‑pointer write, instantly crashing any reachable machine over TCP. The model demonstrated sandbox escapes in browsers and JavaScript engines, then flipped a single bit in a neighboring memory page of the Linux kernel, turning a password executable into a writable file and granting root access. These exploits illustrate a capability that far exceeds typical AI‑driven code generation.

Corporate Response and “Project Glass Wing”

In an urgent meeting, U.S. Treasury Secretary Scott Bessant and Federal Reserve Chair Jerome Powell convened with bank CEOs to discuss Mythos. The outcome was the formation of “Project Glass Wing,” an exclusive consortium that grants Mythos access only to a handful of trillion‑dollar companies and banks. The stated goal is to patch global software before other entities can develop similar capabilities, effectively creating a “big club” that most developers are barred from joining.

Critical Analysis of Performance Claims

Internal leaks reveal that Anthropic has used Mythos internally since February 24, during which time the company suffered source‑code leaks and API downtime. The OpenBSD exploit required 1,000 parallel agent runs and roughly $20,000 in compute, raising questions about the model’s efficiency. Anthropic reported an 84 % success rate for a Firefox exploit, but the test ran on a SpiderMonkey shell with mitigations disabled, not on a live browser. By contrast, the older Opus 4.6 model achieved only a 15 % success rate under comparable conditions, suggesting that the newer figures may be inflated.

Mechanisms Behind the Exploits

The FFmpeg exploit works by tricking the decoder into writing bytes beyond its allocated buffer, leading to crashes and data corruption. The OpenBSD vulnerability is triggered remotely, causing an immediate null‑pointer write that brings down any reachable system. The Linux kernel attack flips a single bit in a neighboring memory page, converting a protected executable into a writable file that the attacker then overwrites to gain root privileges. Project Glass Wing functions as a privileged partnership, allowing elite firms to harness Mythos for mass‑patching critical software while keeping the technology out of broader hands.