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New Firefox update patches a whopping 271 bugs

Mozilla Fixes 271 Firefox Bugs Using Anthropic’s Mythos AI

Mozilla announced Tuesday that this week’s release of Firefox 150 ships with patches for 271 security vulnerabilities uncovered using early access to Anthropic’s Claude Mythos Preview, a powerful AI m...

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Mozilla Used Anthropic’s Mythos to Find and Fix 271 Bugs in Firefox

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New Firefox update patches a whopping 271 bugs, thanks to Claude Mythos

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Anthropic investigating claim of unauthorised access to Mythos AI tool

Anthropic is investigating a claim that a small group of people gained access to its Claude Mythos model - the cyber-security tool which the AI firm says is too powerful to release to the public.

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Alleged Claude Mythos Breach Raises Questions About AI Security

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Is 'Mythos' a new AI model really too dangerous?

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Anthropic’s Mythos rollout has missed America’s cybersecurity agency

Combined with other actions to limit CISA’s workforce and funding, the report signals that CISA’s operations still haven’t been prioritized by the administration, possibly putting digital security at ...

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Anthropic Investigates Unauthorized Access to Its New Mythos AI Model

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Anthropic investigating report of 'unauthorized access' of powerful Mythos model

Mythos found 271 Firefox flaws – but none a human couldn’t spot

The FOSS outfit on Tuesday reminded readers that it used Anthropic’s Opus 4.6 model to look for bugs in Firefox 148 and found 22 bugs. Mythos found 271 vulnerabilities in Firefox 150. Mozilla CTO Bobby Holley expressed mixed feelings about that result,

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Firefox 150 and iOS 26.4.2 roll out with security fixes

Apple has released iOS 26.4.2 with unspecified bug fixes and a single security patch, while Mozilla’s Firefox 150 adds PDF editing tools, improved split view, and addresses 41 security vulnerabilities. Both updates underscore a broader push for timely ...