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ProgrammingDEV Community ·

CISA Flags Exploited Check Point Path Traversal Flaw CVE-2026-93616 as Critical

CISA added CVE-2026-93616, a critical path traversal vulnerability in Check Point management and logging products, to its Known Exploited Vulnerabilities catalog on September 22, 2026. The flaw lets an unauthenticated attacker upload files outside their intended directory and execute arbitrary scripts on the server. Check Point has acknowledged that a small number of customers were attacked. Affected products include Security Management Server, Multi-Domain Security Management Server, Log Server, Multi-Domain Log Server, and SmartEvent. At the time of reporting, no final patch covering all affected releases was available, and LivePatch Take 28 and Take 29 did not resolve the issue.

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ProgrammingDEV Community ·

How to Demo a Developer Tool, CLI or API on Video

Developer products are difficult to showcase on video because their most valuable features, such as the time saved, are often invisible on screen. The article recommends a structured demo covering the problem, installation, a minimal working example, and the result, typically kept to 60 to 90 seconds. It stresses readability, advising large fonts, short lines, highlighted key changes, and high contrast so terminal and code text can be read on phones. For APIs, which have no user interface, it suggests showing requests and responses side by side or pairing code with its visible effect. The author also notes that copyable code should accompany the video in the post or README, since viewers cannot copy text from a video.

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ProgrammingDEV Community ·

Alias Browser Offers Isolated Multi-Profile Workspaces With Per-Profile Fingerprints and Proxies

Alias Browser is a multi-profile browser aimed at QA teams, ad-ops staff, agencies, and privacy-minded users. Each profile runs as a separate environment with its own generated browser fingerprint, cookies and storage, and independent network routing through HTTP/S or SOCKS4/5 proxies or built-in WireGuard VPN tunnels. The product includes per-profile DNS-level ad and tracker blocking, a local REST API and MCP server for scripting and AI-agent automation, and optional end-to-end encrypted sync that can be self-hosted. It states that it collects no telemetry and needs no account to run, offers a free tier of three profiles, and provides paid Pro and Team plans. Downloads are available for macOS, Windows, and Linux.

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ProgrammingDEV Community ·

Cold starts on free hosts can make a demo look broken to first-time visitors

An indie founder sent a demo link late on a Sunday, and the first request took nearly 40 seconds because the free host had gone to sleep, causing a visitor to leave before the page loaded. The first request from a new visitor is what matters most, and free hosts and throttled model endpoints both slow down at that moment. The article proposes a shell script that measures warm, cold, and model-call latency against a deployed URL after a period of idleness. It explains how to interpret the time-to-first-byte and total times, and notes that the ratio between cold and warm requests matters more than raw numbers. The author warns that scheduled keep-alive pings can be unreliable or violate free-tier terms, and suggests manually pre-warming the URL shortly before sharing it.

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ProgrammingDEV Community ·

Diagnosing a Node.js Memory Leak Hidden in Module-Scope State

A developer's Node.js service stayed healthy for about an hour after each deploy and then steadily consumed more memory, with restarts as the only fix. The article argues that such leaks usually sit at module scope, where references outlive individual requests, rather than inside request handlers. It recommends tracking heapUsed after forced garbage collection, since a rising baseline indicates true retention, and using heap snapshots with the DevTools Comparison and Retainers views to trace the cause. The author traced the problem to a Map declared outside a function, and the piece notes that serverless platforms reusing function instances can exhibit the same behavior. It also outlines five common module-scope patterns behind most Node.js leaks, including unbounded caches, accumulating event listeners, and timers capturing request objects.

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ProgrammingDEV Community ·

Why one developer enforces AI agent limits outside the prompt, not inside it

A developer argues that AI agents with tool access should be treated like untrusted third-party dependencies and contained accordingly. The key rule is that constraints are set when the process starts, since a prompt is only a request that a model can ignore or be manipulated into bypassing. In their agent, the tool list is fixed in advance, allowing twelve read tools while refusing fifteen write tools, so the agent cannot write files or send messages even if it tries. Additional safeguards include an anti-injection section in the prompt, a mandatory adversarial review of outputs, and human approval before anything is published. The author's reasoning is that an agent does what its environment permits, so impossible actions remove the need to trust it.

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ProgrammingDEV Community ·

Building an MCP Server Without an OpenAPI Spec in TypeScript and Python

A DEV Community guide explains how to create a Model Context Protocol server by hand instead of generating tools from an OpenAPI document. The author argues that many projects lack a formal API spec, and that auto-generated tools can be more than a model needs. A tool, the guide notes, consists only of a name, a description, and typed parameters, which can be written in a few lines. The walkthrough provides minimal server examples in TypeScript and Python, tested on Node 20 and Python 3.13, with stdio transport and guidance on connecting to Claude Desktop and Cursor. It also flags a version pitfall: the Python SDK's mcp 2.x renamed FastMCP to MCPServer, so older tutorials will break.

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ProgrammingDEV Community ·

LocalList AI Generates Product Listings for Small Online Sellers Using Local AI

LocalList AI is a lightweight, AI-powered tool built for small online sellers, thrift stores, and social media businesses that need quick product listings. Sellers enter basic details such as the product name, price, condition, and notes, and the app produces a title, a description, and five hashtags they can edit before posting. The project was created as a submission to Hacktoberfest's Open-Source AI Challenge and runs on a Node.js and Express backend with a Gemma model served locally through Ollama. Its developer says running inference on the user's machine avoids recurring costs of paid hosted AI APIs and can keep product data off external servers, depending on deployment. A possible future version could add bulk listing generation and platform-specific descriptions.

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ProgrammingDEV Community ·

Verify a Blob's type before naming an exported image file

An image encoder may return a different format than the one requested, so a filename chosen from the request can be misleading. For canvas exports, toBlob() falls back to PNG when a requested MIME type is unsupported, and its callback receives null if no image can be created. A fallback should be treated as a different output type, and a null result as a failed export. The requested format should be kept separately and compared with the returned Blob's type before choosing a download filename. Applications that require a specific format should show a clear failure rather than silently changing it, while acceptable fallbacks should be explained in the interface.

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ProgrammingDEV Community ·

Agent patches can alter test fixtures unseen; fingerprinting the setup layer closes the gap

Reviews of AI-agent patches usually check only source and test code, missing edits to setup files such as conftest.py, factories, seed data, and golden files. Such changes can make a failing suite pass while quietly weakening its checks, for example by making a uniqueness check unreachable or by regenerating golden files to match new output. The author proposes treating the setup layer as an explicit review input, starting with a content-hash fingerprint over every file that affects test state. A CI-friendly script compares the current digest against a committed baseline and fails when any setup file has changed. A pytest plugin also records which tests use which fixtures, so reviewers can see which tests a changed setup file actually affects.

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ProgrammingDEV Community ·

Security Review Flags Upgrade Governance and Bridge Risks in Rocket Pool

A new smart-contract security assessment of Rocket Pool, the largest decentralized liquid-staking protocol on Ethereum with roughly $1.26 billion in total value locked, has been published. The analysis identifies an overall risk score of 6.8 out of 10, rated moderate-to-high. The most serious findings involve upgrade and governance controls, where single-key admin rights and missing timelocks could enable harmful parameter changes or contract replacements. Cross-chain bridge security is also highlighted as a high-priority concern, including possible replay of Layer 2 deposit proofs and reliance on a single state-root verifier. The report further notes lower-severity issues in reward calculations, node lifecycle handling, and token interactions, and recommends that upgrade governance and bridge security be addressed first.

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ProgrammingDEV Community ·

Belady's Anomaly Tested in Python: FIFO, LRU and Optimal Page Replacement

A GATE CS page replacement tutorial walks through counting faults under FIFO, LRU and Optimal policies using a small Python checker. The author notes a textbook reference string with 3 frames that is worked through without the answer printed. A random simulation of one million strings found FIFO faulting more with 4 frames than with 3 in a single case, while LRU never did. An exhaustive C count over all 5^12 strings found FIFO's anomaly in exactly 120 of them, roughly 1 in 2 million. The author advises checking a question's wording first, since only FIFO can exhibit this behavior, and cross-checking practice answers against official keys.

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ProgrammingDEV Community ·

Approving Model-Drafted Docs by Sentence Hash, Not Whole Pull Requests

A DEV Community article argues that documentation reviews usually approve an entire pull request rather than individual sentences, so approvals can keep covering text a model later rewrote. It proposes binding each human sign-off to a hash of the exact approved text, so any edit automatically invalidates the signature. The method uses a roughly 90-line Python checker run in pre-commit and CI that verifies whether a named human has signed a given block, without gating generation or judging prose quality. The author also offers a table of which block types models may draft and which humans must own, such as install commands, limits, and security warnings. The piece notes that the approach complements source hashing, which tracks input changes, and that the article carries a disclosure as part of a vendor's product outreach.

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ProgrammingDEV Community ·

PlxNative: Unofficial Plex Client for LG webOS TVs Built Natively in Rust

PlxNative is an open-source, unofficial Plex client for LG webOS TVs that skips the browser engine and JavaScript layers typical of smart-TV apps, drawing its interface directly through OpenGL ES. Developed by Gleb Linnik as a spare-time project under the GPL-3.0-or-later licence, its current release is v0.8.0, published on 7 October 2026. The app is free and requires a Plex account and a Plex Media Server, and its developer built it after finding Plex browsing on his 2019 LG TV slower than he wanted. The codebase is mostly Rust organised into layered crates, with video playback handed to the TV's built-in hardware decoding rather than decoded in software. The developer claims 60 fps performance on the 2019 set, though the article's author could not verify this on a real television.

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ProgrammingDEV Community ·

Cron Triggers for Deadline Reminders: Why the Scheduler Should Not Be the Ledger

Renewal reminder systems face a trade-off between latency and cost, which is governed by how often the scheduler wakes up. The article argues that cron should only trigger an idempotent scan of due reminders, while delivery timing is stored in the data itself. A logistics example with carriers' insurance certificates and depots in Rotterdam and Chicago illustrates how timezone errors and missed runs can cause serious legal consequences. Each occurrence should be recorded as a row before delivery, so recovery from pauses, outages, or redeploys does not depend on scheduler history. Because schedulers handle missed runs inconsistently, catch-up behavior should be defined in the scan using a durable cursor, a bounded horizon, and an expiry policy.

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ProgrammingDEV Community ·

OpenGCUA Releases Open-Source Stack for Computer-Use AI Agents

Researchers published the arXiv pre-print 2610.22200 on 15 October 2026, introducing OpenGCUA, a fully open stack for general-purpose computer-use agents. The project quickly gained traction, earning 280 upvotes on Hugging Face and hundreds of forks within a day. Its developers position it as a free, inspectable alternative to proprietary agents that charge per action for GUI, CLI and vision tasks. The article argues this could reduce enterprise automation costs, with a sample workload estimated to save $50,000 to $150,000 a year. The core runtime is scheduled for release on 31 October 2026, with a plugin marketplace planned for early 2027.

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ProgrammingDEV Community ·

Running Short-Video Apps on Low-End Feature Phones Depends on Device Limits

A short-video app can run on a low-end feature phone only if the device supports the required decoding, display, networking and application workload. Playback must fit within limited resources, covering compressed data retrieval, frame decoding, display and audio handling, while keeping the interface responsive. A small screen reduces display data but does not ensure codec compatibility or smooth playback. The article notes that public PMAOS Mobile documents confirm media and runtime support but not a verified short-video app, supported formats or measured performance. It recommends defining the device's memory, storage, processor and decoder limits first, then testing representative files and peak memory during clip transitions.

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ProgrammingDEV Community ·

Can Feature Phones Support an App Store? Runtime Versus Distribution

Feature phones can host an app store if their software platform supports application formats, installation, a catalog, and distribution, as KaiOS's KaiStore demonstrates. A keypad and small screen do not inherently rule this out. An application runtime, which executes software, is distinct from a store, which helps users find and obtain it. Between them lies an installation lifecycle covering compatibility checks, storage allocation, version management, and removal. The article stresses that a phone may offer a runtime with preinstalled apps and no public storefront, and that developers must consider device compatibility, storage, trust, recovery, and keypad-friendly interaction before launching a store.

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ProgrammingDEV Community ·

How AI is reshaping technology and what it means for the future

Artificial intelligence is changing the way people learn, work, communicate and tackle problems, with uses ranging from virtual assistants to fraud detection and smart manufacturing. The article explains that AI supplies capabilities such as pattern recognition, language understanding and prediction, which hardware, software and data infrastructure make possible. It highlights examples in healthcare, where AI helps analyse medical images under clinical oversight, and in education, where it supports personalised study while requiring verification and academic integrity. The piece also notes that growing AI adoption in India, backed by a strong digital economy and government initiatives, creates opportunities alongside concerns about privacy, employment and responsible innovation.

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ProgrammingDEV Community ·

Client-side rendering hid a pinyin chart from search engines; pre-rendering fixed it

A pinyin chart site found that its syllable table, which should contain about 400 entries, was rendered only by JavaScript at runtime, so crawlers received an empty table. Bing data showed 101 impressions and zero clicks for the page, and the author attributed this to searchers leaving before the script populated the content. The team fixed it by pre-rendering the syllable data into the HTML at build time while keeping JavaScript for audio playback, expanding the crawlable cells to 374. The same approach was applied to four more pages, and a non-idempotent build script that duplicated content prompted a dry-run-first rule. The author also noted a separate tool that reported zero backlacks for nineteen days when the links actually existed.

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