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Casey Ellis

Casey Ellis

Hacker, founder, advisor, and pioneer of crowdsourced security. Founder of Bugcrowd, co-founder of disclose.io, principal of Tall Poppy Group. Board member at SRLDF.

Security

Peacetime cyber versus wartime cyber

Cyber defense doctrine was built during 15 years of peacetime; the transition to wartime and austerity demands a rewrite of what we accept as polite.

30 Apr 2026 · 1 min read
Three pale-blue speckled House Finch eggs nestled in a cup of dried grass on a sunroom bookshelf
Personal

"Monitoring the Situation" - The Internet of Birbs

Two pale-blue speckled eggs on the sunroom bookshelf turned into three cameras, an Unraid NAS, two AI models, and a journal that writes itself every morning. None of it had to be useful — it just had to be possible. Because joy.

29 Apr 2026 · 7 min read
Security

AI isn't the problem — asymmetry is

AI isn't the security problem — it widens the asymmetry between vulnerability discovery and remediation, putting attack capability in many more hands.

27 Apr 2026 · 1 min read
Security

Mythos feels a lot like Snowden

Mythos is to vulnerability awareness what Snowden was to surveillance: the moment the zeitgeist finally caught up to what insiders already knew.

26 Apr 2026 · 1 min read
Hot Takes

Security-focussed test/fix is basically “sparkling QA”

A short reaction to Firefox's claim that AI-found defects are finite: security-focused test-and-fix is basically QA wearing a fancier hat.

25 Apr 2026 · 1 min read
Security

Spicy Takes from my Aikido Security Podcast

Nine takes from my RSAC conversation with Mackenzie Jackson on Aikido's Secure Disclosure podcast — on bug bounty, AI slop, hack-back, vibe coding, and why the internet still working is a minor miracle.

24 Apr 2026 · 5 min read
Thinking

We don't have a slop problem.

The real security problem isn't AI slop — it's that vulnerability research and the broader industry can't prioritize what actually matters in the noise.

24 Apr 2026 · 1 min read
Thinking

Build the tooling. Don't be the tooling.

The AI move in vulnerability research isn't prompting from scratch every run — it's using AI to build deterministic scanners, fuzzers, and analysis pipelines.

22 Apr 2026 · 1 min read
Security

Offense Scales with Compute. Defense Scales with Committees.

Why AI is widening the attacker-defender gap faster than anything we've built to close it — and what that actually means for the next decade of security.

08 Apr 2026 · 11 min read
Security

Why Security Teams Gaslight Hackers: Disclosure Reality

The cybersecurity industry has a dirty secret: security teams are systematically dismissing legitimate vulnerability reports from ethical hackers. In a recent episode of Hackers

02 Apr 2026 · 2 min read
Thinking

The Compliance Reckoning

AI makes security verification cheap, putting two decades of checkbox compliance, paper pentests, and audit theater under sudden economic pressure.

28 Mar 2026 · 4 min read
Security

Bug Bounties in the Age of AI

As AI accelerates the offense-defense asymmetry, bug bounties and vulnerability disclosure remain essential. Casey Ellis on the future of bug bounties, the evolving threat landscape, and how disclose.io and the SRLDF protect the researchers keeping us safe.

27 Mar 2026 · 4 min read