The Vulnpocalypse: Mozilla Fixed 423 Firefox Bugs in April Using Mythos — 20x Historical Monthly Average

The Register·high signal

The Register reports Mozilla fixed 423 Firefox bugs in April 2026 using Anthropic's Mythos, compared to 76 in March and a historical average of 21.5 per month — a 20x acceleration. Combined with Palo Alto's 7x improvement and Microsoft's MDASH results, this signals what researchers call a vulnpocalypse: AI-discovered vulnerabilities now flood faster than teams can triage and deploy patches. Katie Moussouris (Luta CEO) warns the bottleneck is now triage, disclosure, and getting customers to deploy.