Claude Mythos Cracks Firefox Bugs Fuzzing Missed
Claude Mythos Preview found 20-year-old XSLT and JIT bugs in Firefox that survived years of fuzzing. Mozilla shows AI now catches sandbox escapes and memory corruption. Add LLM security scanning to hardening workflows before attackers adopt them.
Claude Mythos Preview uncovered Firefox bugs that evaded years of fuzzing, including a 20-year-old XSLT flaw, JIT equality checks yielding arbitrary read/write, and IPC race conditions enabling sandbox escapes. Mozilla revealed reports usually kept private, showing that advanced steering turned AI-generated security reports from noisy slop into high-signal findings. For production teams, LLM-assisted analysis now surfaces memory corruption and privilege escalation paths that traditional tools miss.
Read the original → Mozilla Hacks
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- #sandbox
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