Mozilla says Anthropic’s Mythos AI can end zero-day security attacks: Here’s why
Last Updated: 2026-04-24 14:37:57
Mozilla has seen the positives of using AI to tackle major security attacks and did so with the help of Anthropic’s Mythos AI model and ran it through the Firefox browser code. Mozilla and Anthropic have teamed to run the Claude Mythos Preview model to find bugs in the browser code that can help them fight possible zero-day attacks and also prevent them from even being an issue in the future.
Finding bugs and fixing them has been the job of security researchers for a long time but AI could not only save them time for other tasks but also make a lot of redundant in the not-so-distant future.
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Mythos Preview is every bit as capable” as the world’s best security researchers, Mozilla made the admission during the whole exercise where the AI model did a lot of work in just one round of testing. The company mentioned that Mythos Preview helped them find 22 security-linked bugs and 90 more bugs of different nature.
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Human expertise has been the fulcrum of deep-end security checks and companies needed their assistance because AI was incapable of working to the same effect. Fast-forward to 2026, and you have Mozilla confirming the use of technology has the same impact as the researchers and it makes it happen at a faster clip. This also tells you why Mythos was quick to find the bugs that might have taken human researchers far longer to report.
Rejoice or fear?
Mozilla sees the good and bad of these results. It is terrified by the results from Mythos Preview but is practical enough to realise the impact of such discoveries in the long run. The threat of AI being used by bad actors is another concern that companies are weary about but Mozilla is clearly looking at the bigger picture.
“A gap between machine-discoverable and human-discoverable bugs favors the attacker, who can concentrate many months of costly human effort to find a single bug. Closing this gap erodes the attacker’s long-term advantage by making all discoveries cheap."
Mozilla is seeing the future being easier and faster to detect and fix the bugs, and we see other tech companies adopting a similar stance which helps them mitigate the scarcity of experts in this domain.