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Rejetto HFS CVE-2026-61500 exploited a day after write-up

Attackers began exploiting CVE-2026-61500, a critical flaw in the Rejetto HFS file server, on October 3, 2026. That was one day after Horizon3.ai published how it works, The Register reports. The bug lets anyone forge an administrator login and then run code on the server. It was found with Mythos, Anthropic's vulnerability-hunting AI model, and HFS 3.2.1 fixes it. What Rejetto HFS is and which versions are affectedHFS, short for HTTP File Server, is a free, open-source program that shares

I Built a Full PWA Game in One Day with Claude Opus 5.5 and Claude Code (Here Is the Real Token Cost & Harness Setup)

On Sunday I sat down to turn a three-sentence idea into a browser game, Montanha: Zero Day. A prompt that short is a photo of a cabinet: you can see the shape, and you still have no jig for the cuts.Without the jig, the model invents the workshop. A framework, a bundler, a new folder layout, and the token limit goes into the second and third attempt. I have watched that happen. The hard part is not the idea. It is holding the cut after the first structure comes out wrong.What held it was not a l

5 Common Mistakes Beginners Make When Building an Express API

Building your first Express API is usually straightforward.You install Express, create a server, add a few routes, and suddenly you have a working backend.The harder part comes later.As the project grows, small decisions that seemed harmless at the beginning can make the code harder to understand, test, and maintain.Here are five common mistakes beginners make when building Express APIs, along with practical ways to avoid them. 1. Putting Everything in server.jsA small Express application o

The Java Collections Framework: Choosing Your Weapon Like a Jedi

The Quest Begins (The "Why")I was knee‑deep in a backend service that needed to hold a handful of configuration objects, hand them off to a bunch of worker threads, and then swap the whole set out when a reload came in. My first instinct? Grab an ArrayList, wrap it in Collections.synchronizedList, and call it a day. Everything worked fine until the reload happened under load. Suddenly I saw ConcurrentModificationException bubbling up from threads that were merely iterating over the list w

Intercepting a Wallet from a Browser Extension (TxnLense, Part 1)

Every time you sign something, an application asked your wallet to do it through a single JavaScript call, and your wallet showed you its interpretation of that call. Sometimes the interpretation is good. Often it's a hex blob and a confirm button. I wrote about the standards effort to fix this at the source in The End of Blind Signing: ERC-7730, clear signing, wallets and dapps agreeing on a way to describe what a signature does.TxnLense is the other approach: what can you do today, without wai

Shai-Hulud 2.0 and the npm Maintainer Account Problem

Shai-Hulud 2.0 and the npm Maintainer Account Problem Why package maintainers are the targetA dependency attack does not need a vulnerability. It needs a publishing credential. When an attacker holds a maintainer account, every downstream consumer installs attacker code through the normal, expected update path. JFrog's analysis of a new Shai-Hulud variant describes that pattern: a campaign that spread across more than 400 npm packages and more than 1,700 package versions. How the

Multilingual Ghost CMS Blog: 6. Fixing Invisible Post Excerpts on Tag Pages

Originally published by Sanghun Kang on Sep 26, 2026. View the original post.In the previous version, I also applied multilingual filtering to the Tag page. It shows only the post cards that match the language selected in the Language selector, and I also added an opacity transition so the cards fade in smoothly.But when I actually used it, there was a problem: the post card titles and images were visible, but the post excerpts remained transparent.The card title and image are visible, but the e

What Actually Happens When You Type a URL?

What Actually Happens When You Type a URL?You type:https://example.comYou press Enter.A second later, the website appears.But what actually happened during that one second?A lot more than you might think.Let's break it down in simple terms. 1. The browser checks the URLThe browser first understands what you entered.For:https://example.comwe have:https → protocolexample.com → domainThe protocol tells the browser how it should communicate with the server. 2. DNS finds the serverYou

Devtools for Multithreaded Applications: Zero-Cost Observability for Web Workers

AtollJS is an open-source SDK for moving real work off the main thread: typed worker pools you call like local objects, shared-memory state that stays in sync across threads without serialization on the hot path, and UI islands that render React, Vue, Solid, Svelte, or Angular entirely inside web workers. The core is ~12 KB gzipped on the main thread with no runtime dependencies.A pool is a method list on the worker side and a typed Proxy client on the main side:// counter.worker.ts: the worker

How to Generate Voice Content for E-Learning Platforms

Why Voice Matters in E‑LearningIf you’ve ever taken a self‑paced course, you know how much a clear, natural‑sounding narration can boost comprehension and retention. Voice adds a human touch, breaks up dense text, and makes content accessible to learners with visual impairments or reading difficulties. With modern text‑to‑speech (TTS) APIs, you can generate high‑quality audio at scale—no need to hire a voice actor for every module. Choosing a TTS EngineWhen you start evaluating TTS pr

React Dashboard Query API — Hosted Metrics for Tenant Experiment Attribution

TL;DR: Choose a hosted metrics query API only after proving that every experiment series can carry a stable tenant-cohort identifier, a bounded time range, and an attributable ingestion and retention cost. Put a Node.js boundary between React and the provider, return one small response contract for cards and charts, and reject unbounded queries. A convenient query endpoint cannot repair ambiguous cohort membership or uncontrolled label cardinality.For a B2B SaaS admin panel, the operational deci

🚀 Building a First Full-Stack User Management System with React, Node.js & MongoDB

Why I Started Building This ProjectI'm currently learning full-stack web development, and instead of only following tutorials, I decided to build a real project from scratch.I'm building a Full-Stack User Management System using:⚛️ React + TypeScript🟢 Node.js + Express🍃 MongoDB + Mongoose🔐 JWT Authentication🧰 Redux Toolkit What I've Learned So FarOne of the biggest things I've realized while learning full-stack development is that understanding how the frontend and backend communicate

GitPulse – a live 3D globe of GitHub activity

I kept wondering what GitHub would look like if you could see it instead of reading it. So I built Git Pulse: a live 3D globe of public GitHub activity, by city.Live demo: https://gitpulse3d.vercel.appYou can search a city and fly there, filter by language or activity type, and replay the last 24 hours. The day/night line follows the real sun. How it worksGitHub Events API → validate → dedupe → resolve a location → aggregate into 15-minute buckets → Postgres + Redis → REST and WebSocket → R

Four tools on our marketing site, none of which have a backend, and one that competes with us

pub-trivia.app/tools has four free tools on it. Open your Network tab and use any of them. Nothing goes out. There is no API route behind them, no account, no email wall and no watermark, because there is nothing on the other end to send anything to.That is not a privacy flourish, it is the architecture. Four tools with no backend cost us nothing to run and cannot be abused, which is the only reason it is reasonable to give them away with no conditions attached. It also makes "what do you do wit

Looping and Modifying Nested Arrays in JavaScript

IntroductionWhen working with a nested array, we may have many values stored in different groups.For example, imagine we have several groups of numbers and want to display all of them. We could access each value one by one, but that can become inconvenient, especially when the data gets larger.Instead, we can use a loop to go through the values for us. This allows us to perform the same action on multiple items without writing the same code over and over.With a nested array, there is one m

I built a regex debugger that shows every backtrack (flame graph included)

Testers tell you what a regex matches. A debugger tells you why — and where it burns time.Every regex tester shows the same three things: matches, groups, and an explanation of the pattern. That covers the happy path. It stops helping the moment a regex is almost right — matching one tag too many, missing a case you can't reproduce, or taking 400 ms on an input that looks identical to the one that took 4.The failure modes of a backtracking engine are invisible from the outside. A pattern doesn't

Nuxt 4.5 SSR Streaming: The Route Rules That Disable It

Your team flips experimental.ssrStreaming: true in nuxt.config.ts, loads the homepage, and Time to First Byte drops from 1.8 seconds to 40 milliseconds. Everyone's thrilled. Someone ships it to every route in the app. Two days later, a teammate asks why the pricing page — behind a cache route rule, same layout, same components — didn't get any faster. Then a third teammate reports pages crashing in production with an error nobody on the team has seen before: ERR_HTTP_HEADERS_SENT.Nothing here is

I ran my accessibility checker against gov.uk. It found 72 violations — all of them were mine.

I built a Chrome extension that checks pages against the automatable parts of WCAG 2.2 AA. This post isn't really about the extension. It's about what happened when I stopped trusting it. The control groupOnce the checker worked, the first thing I did was point it at gov.uk. The UK government's site has a long, public record of taking accessibility seriously. If my tool reported problems there, the sensible assumption was that the tool was wrong, not the site.It reported 72 violations. Ever

A blob URL needs an owner, not just a cleanup call

Disclosure: This article was generated with AI from a source-code review and browser API documentation. Its API claims were checked against the linked MDN references, and the example's lifecycle behavior was tested in a mocked DOM. It is not a report of measured production results or real-browser compatibility testing.A file-preview widget can look complete when an image appears and its download link works. There is another question worth answering: what ends the lifetime of the URL connecting t

How to Run Puppeteer in Production Without It Crashing (and When to Stop)

Puppeteer in production has a signature failure: it works perfectly on your laptop, passes every test, and then falls over the moment real traffic hits it. The browser that launched instantly in development cannot find Chrome in the container. The capture that always worked times out on a slow page. Memory that sat flat under one request climbs until the box is OOM-killed at concurrency. None of it showed up locally because local never looked like production.This guide covers why that gap exists