Project Glasswing: An Initial Update

Re:Project Glasswing: An Initial Update by energy123 on Friday May 22, 2026 @03:52PM (#48240710)

. Mozilla found and fixed 271 vulnerabilities in Firefox 150 while testing Mythos Preview—over ten times more than they found in Firefox 148 with Claude Opus 4.6;

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Re:Project Glasswing: An Initial Update by kllrnohj on Friday May 22, 2026 @04:16PM (#48241042)

No, not really. Mythos found 3 CVEs, not 271.

https://www.flyingpenguin.com/mythos-mystery-in-mozilla-numb...

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Re:Project Glasswing: An Initial Update by simonw on Friday May 22, 2026 @04:28PM (#48241199)

The Mozilla team responded to that argument here: https://hacks.mozilla.org/2026/05/behind-the-scenes-hardenin... - in the FAQ.

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Re:Project Glasswing: An Initial Update by moyix on Friday May 22, 2026 @04:24PM (#48241149)

I think you're confusing CVEs and vulnerabilities here? Mozilla (per their longstanding practice) grouped multiple vulnerabilities found internally under a small number of CVEs.

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Re:Project Glasswing: An Initial Update by dawnerd on Friday May 22, 2026 @04:13PM (#48241002)

And of those 271, how many were very minor, really not an issue, kinda of fixes? And how many of the fixes will end up opening up being new vulnerabilities?

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Re:Project Glasswing: An Initial Update by applfanboysbgon on Friday May 22, 2026 @04:05PM (#48240893)

Did they allocate the same number of tokens to looking with Claude 4.6? Or did they find more because they looked more, owing to a special initative by Anthropic?

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Re:Project Glasswing: An Initial Update by properbrew on Friday May 22, 2026 @04:13PM (#48240999)

> over ten times more than they found in Firefox 148 with Claude Opus 4.6

And how much with Opus 4.7? 5x?

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