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Cybersecurity Tech Brief By HackerNoon

HackerNoon

Learn the latest Cybersecurity updates in the tech world.

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Thursday · 5 min
Why I Built a Password Manager That Never Touches the Cloud
This story was originally published on HackerNoon at: https://hackernoon.com/why-i-built-a-password-manager-that-never-touches-the-cloud. Kryptix removes accounts, telemetry, and cloud sync from password management while offering encrypted backups, biometrics, and auditable code. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #passwords, #security, #data-security, #password-security, #offline, #react-native, #password-manager, #data-privacy, and more. This story was written by: @nima01. Learn more about this writer by checking @nima01's about page, and for more stories, please visit hackernoon.com. Kryptix removes accounts, telemetry, and cloud sync from password management while offering encrypted backups, biometrics, and auditable code.
Thursday · 5 min
Inside Xalgorix: An AI Pentester Built Around Exploit Verification
This story was originally published on HackerNoon at: https://hackernoon.com/inside-xalgorix-an-ai-pentester-built-around-exploit-verification. Xalgorix is an open-source AI pentester that separates vulnerability discovery from independent exploit verification. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #devsecops, #open-source, #penetration-testing, #application-security, #security-testing, #artificial-intelligence, #ai-agents, and more. This story was written by: @xalgord. Learn more about this writer by checking @xalgord's about page, and for more stories, please visit hackernoon.com. Xalgorix is an open-source, self-hosted AI pentester whose independent verifier re-exploits candidate findings before they are reported.
Wednesday · 5 min
When an Expired Domain Becomes a Security Problem
This story was originally published on HackerNoon at: https://hackernoon.com/when-an-expired-domain-becomes-a-security-problem. Old domains can retain backlinks, references, integrations and digital history long after their original owners stop using them. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #infosec, #web-security, #dns, #web-domains, #expired-domains, #domain-security, #cybersecurity-awareness, and more. This story was written by: @cyberbezpieczenstwo. Learn more about this writer by checking @cyberbezpieczenstwo's about page, and for more stories, please visit hackernoon.com. Expired domains aren't just an SEO asset — they can become a cybersecurity risk. Old domains may still be referenced in documentation, DNS, email systems, APIs and external websites. If someone else registers the domain, that forgotten digital footprint can potentially be abused. Organizations should treat domain retirement as part of their security lifecycle and audit dependencies before allowing a domain to expire.
Tuesday · 17 min
62 Blog Posts To Learn About Network
This story was originally published on HackerNoon at: https://hackernoon.com/62-blog-posts-to-learn-about-network. Learn everything you need to know about Network via these 62 free HackerNoon blog posts. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #network, #learn, #learn-network, and more. This story was written by: @learn. Learn more about this writer by checking @learn's about page, and for more stories, please visit hackernoon.com.
Tuesday · 18 min
Claude Code Hooks: How to Stop AI Agents From Breaking Your Code
This story was originally published on HackerNoon at: https://hackernoon.com/claude-code-hooks-how-to-stop-ai-agents-from-breaking-your-code. Learn how Claude Code hooks create deterministic guardrails that block dangerous commands and verify AI-generated code before problems ship. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #docker, #large-language-models, #programming, #api, #artificial-intelligence, #claude-code-hooks, #good-company, and more. This story was written by: @sonarsource. Learn more about this writer by checking @sonarsource's about page, and for more stories, please visit hackernoon.com. Learn how Claude Code hooks create deterministic guardrails that block dangerous commands and verify AI-generated code before problems ship.
Monday · 9 min
Prompt Injection Is Now an RCE Primitive
This story was originally published on HackerNoon at: https://hackernoon.com/prompt-injection-is-now-an-rce-primitive. When AI controls tools, prompt injection becomes execution risk. Map primitives, remove authority, isolate runtimes, validate inputs, and monitor hosts. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #ai-security, #prompt-injection, #rce, #ai-agents, #ai-agent-security, #semantic-kernel, #runtime-isolation, #hackernoon-top-story, and more. This story was written by: @superorange0707. Learn more about this writer by checking @superorange0707's about page, and for more stories, please visit hackernoon.com. The article argues that prompt injection in tool-using agents should be treated as an execution-path problem, not just a content-filtering problem. Its core recommendation is to map every untrusted input source to the tools, primitives, credentials, filesystem paths, and network destinations it can reach, then break those paths with least privilege, typed tool design, sandboxing, scoped credentials, approval gates, and host-level monitoring.
August 22 · 5 min
Name It, Frame It, Check It: A 3-Step Fix for Phishing
This story was originally published on HackerNoon at: https://hackernoon.com/name-it-frame-it-check-it-a-3-step-fix-for-phishing. Why do employees still fall for phishing after security training? A cognitive security experiment explores how objective thinking may reduce risk. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #security, #social-engineering, #phishing, #social-engineering-attacks, #social-engineering-tricks, #phishing-email, #prevent-phishing, #how-to-prevent-phishing, and more. This story was written by: @leah-zitter. Learn more about this writer by checking @leah-zitter's about page, and for more stories, please visit hackernoon.com. Why do employees still fall for phishing after security training? A cognitive security experiment explores how objective thinking may reduce risk.
August 21 · 8 min
Why You Should Stay Away From Free VPNs (and Use ApexGuard Instead)
This story was originally published on HackerNoon at: https://hackernoon.com/why-you-should-stay-away-from-free-vpns-and-use-apexguard-instead. Free VPNs can come with slow speeds, data caps, ads, and tracking. Learn what to check before trusting a VPN with your internet traffic. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #vpn, #apexguard, #free-vpn-safety, #vpn-data-privacy, #vpn-speed-limits, #vpn-logging, #ram-servers-vpn, #good-company, and more. This story was written by: @nicafurs. Learn more about this writer by checking @nicafurs's about page, and for more stories, please visit hackernoon.com. Free VPNs can come with slow speeds, data caps, ads, and tracking. Learn what to check before trusting a VPN with your internet traffic.
August 21 · 6 min
How an AutoGPT Email Block Became an SSRF Surface
This story was originally published on HackerNoon at: https://hackernoon.com/how-an-autogpt-email-block-became-an-ssrf-surface. CVE-2026-33234 let authenticated AutoGPT users scan internal networks and leak SSH banners through its unprotected SMTP connection path. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #cve, #autogpt, #ai-and-ml, #ai-security, #network-security, #vulnerability, #pavan-nallamothu, and more. This story was written by: @pavanchow. Learn more about this writer by checking @pavanchow's about page, and for more stories, please visit hackernoon.com. AutoGPT enforces strict SSRF protections on its HTTP layer. But the SendEmailBlock uses Python's smtplib to open raw TCP sockets, bypassing the blocklist entirely. Pointing this block at internal SSH or Redis ports forces smtplib to throw an exception that leaks the service banner directly in the API response. Authenticated users can map the internal network and identify vulnerable services from a single text field. Fixed in backend 0.6.52 by extending IP validation to all outbound protocols.
August 19 · 4 min
SecurityMetrics Wins Cybersecurity Audit Team of the Year from the Hacker News
This story was originally published on HackerNoon at: https://hackernoon.com/securitymetrics-wins-cybersecurity-audit-team-of-the-year-from-the-hacker-news. SecurityMetrics' has won Cybersecurity Audit Team of the year from the Hacker News. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #compliance, #cybersecurity, #audit, #award, #pci-compliance, #pci-dss, #business, #good-company, and more. This story was written by: @pr-securitymetrics. Learn more about this writer by checking @pr-securitymetrics's about page, and for more stories, please visit hackernoon.com. SecurityMetrics' Audit team has won the Cybersecurity Audit Team of the Year award from the Hacker News. This award highlights the Audit team's expertise and commitment to streamlining the compliance process for their clients.
August 19 · 6 min
Businesses Always Have Messy Emails (Part 2)
This story was originally published on HackerNoon at: https://hackernoon.com/businesses-always-have-messy-emails-part-2. Security isn't a product you buy once. It's a process. Because at the end of the day, most security incidents don't start with sophisticated hackers. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #emails, #email-marketing, #newsletter, #businesses-have-messy-emails, #web-monetization, #data-security, #phishing, and more. This story was written by: @arthurtkachenko-rm2m8. Learn more about this writer by checking @arthurtkachenko-rm2m8's about page, and for more stories, please visit hackernoon.com. Cross-team collaboration introduces additional complexity, and the volume of information being shared grows rapidly. Managing access rights, protecting customer information, and preventing accidental data exposure become increasingly difficult.
August 17 · 5 min
Two-Factor Authentication: Because Apparently One Password Wasn't Annoying Enough
This story was originally published on HackerNoon at: https://hackernoon.com/two-factor-authentication-because-apparently-one-password-wasnt-annoying-enough. Two-factor authentication was supposed to make our lives online safer because apparently one password wasn't annoying enough Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #password-security, #passwords, #mfa-fatigue, #account-security, #digital-identity, #authentication-design, #cybersecurity-ux, #login-friction, and more. This story was written by: @technologynews. Learn more about this writer by checking @technologynews's about page, and for more stories, please visit hackernoon.com. Enter your password, prove you have your phone, and you're in. Unfortunately, technology has never been particularly good at leaving simple things alone.
August 16 · 5 min
How Mailing Lists Break DMARC, and Why ARC Only Partly Fixes It
This story was originally published on HackerNoon at: https://hackernoon.com/how-mailing-lists-break-dmarc-and-why-arc-only-partly-fixes-it. Why mailing lists break DMARC, what ARC (RFC 8617) actually does about it, why it only helps where the receiver trusts the sealer, and why From-munging is the reliable fix. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #email-authentication, #dmarc, #dkim, #mailing-list-management, #email-deliverability, #dmarc-alignment, #mailing-lists-vs-dmarc, #mailing-list-security, and more. This story was written by: @vadimivanov. Learn more about this writer by checking @vadimivanov's about page, and for more stories, please visit hackernoon.com. Mailing lists break DMARC because they modify messages and forward from their own servers. ARC lets a list vouch that the message passed DMARC before it touched it, but only helps at receivers that evaluate it and trust the sealer's reputation. From-munging is the universal fix; run both.
August 15 · 12 min
Content Security Policy Report-Only: How to Collect and Analyze CSP Violation Reports
This story was originally published on HackerNoon at: https://hackernoon.com/content-security-policy-report-only-how-to-collect-and-analyze-csp-violation-reports. Learn how to use CSP Report-Only safely: secure the reporting endpoint, normalize and group violations, fix issues, and enforce your policy with confidence. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #content-security-policy, #reporting-api, #csp-report-only-mode, #reporting-api-csp, #csp-policy-enforcement, #csp-violation-reports, #report-to-versus-report-uri, #csp-reporting, and more. This story was written by: @darevskaya. Learn more about this writer by checking @darevskaya's about page, and for more stories, please visit hackernoon.com. CSP Report-Only mode helps you discover what a new policy would break before enforcing it on real users. But collecting reports is not enough: you must secure the public reporting endpoint, validate and sanitize its data, and group related violations so you can separate real application problems from noise and decide what to fix before enforcement.
August 15 · 16 min
Post-Quantum TLS for Cloud APIs and Microservices
This story was originally published on HackerNoon at: https://hackernoon.com/post-quantum-tls-for-cloud-apis-and-microservices. Learn how to migrate cloud TLS to X25519MLKEM768 by treating every TLS termination as a separate boundary, with telemetry, fallback controls, and rollout gates. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #post-quantum-cryptography, #tls-handshake, #quantum-cryptography, #quantum-computation, #post-quantum-tls-migration, #mtls-service-mesh, #hybrid-tls-cloud-exchange-key, #hackernoon-top-story, and more. This story was written by: @nikhil2997. Learn more about this writer by checking @nikhil2997's about page, and for more stories, please visit hackernoon.com. Hybrid post-quantum TLS is not a single application switch—every gateway, proxy, load balancer, and service connection must be migrated and verified independently. X25519MLKEM768 adds manageable CPU cost but substantially increases handshake size, making connection reuse, compatibility testing, telemetry, explicit policies, and reversible rollout gates essential.
August 14 · 2 min
How to Implement Micro-Segmentation in K8s Using Cilium Network Policies
This story was originally published on HackerNoon at: https://hackernoon.com/how-to-implement-micro-segmentation-in-k8s-using-cilium-network-policies. How to implement robust micro-segmentation in Kubernetes environments utilizing Cilium and eBPF Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #micro-segmentation, #k8s, #cilium, #kubernetes, #zero-trust-knowledge, #ebpf, #cilium-network, #kubernetes-guide, and more. This story was written by: @anasrhimi. Learn more about this writer by checking @anasrhimi's about page, and for more stories, please visit hackernoon.com. By defaulting to a deny-all posture and explicitly allowing via CNPs, you establish a resilient micro-segmented architecture where blast radii are strictly contained.
August 14 · 7 min
How to Make Your Repository Ready for AI Coding Agents
This story was originally published on HackerNoon at: https://hackernoon.com/how-to-make-your-repository-ready-for-ai-coding-agents. Learn how deterministic CI, single-gate tooling, AGENTS.md checks, fast tests, and security rules make repositories safer for AI coding agents. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #databases, #git, #artificial-intelligence, #data-science, #finance, #ai-coding-agents, #ai-agent-tooling, and more. This story was written by: @fmind. Learn more about this writer by checking @fmind's about page, and for more stories, please visit hackernoon.com. Learn how deterministic CI, single-gate tooling, AGENTS.md checks, fast tests, and security rules make repositories safer for AI coding agents.
August 12 · 5 min
Reclaim Security Names Stephen Wadsworth VP of Sales as Cybersecurity Shifts From Exposure Discovery
This story was originally published on HackerNoon at: https://hackernoon.com/reclaim-security-names-stephen-wadsworth-vp-of-sales-as-cybersecurity-shifts-from-exposure-discovery. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #cyber-threats, #personal-data-exposure, #cyberthreats, #security, #cyber-security, #ciso, #ciso-insights, and more. This story was written by: @ruth-hasson. Learn more about this writer by checking @ruth-hasson's about page, and for more stories, please visit hackernoon.com.
August 12 · 5 min
Bridges Are Crypto's Weakest Point - Incident Response Is the Real Test
This story was originally published on HackerNoon at: https://hackernoon.com/bridges-are-cryptos-weakest-point-incident-response-is-the-real-test. Crypto bridges remain a major security risk. Here’s why incident response, preparation and transparency matter when a bridge exploit happens. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #crypto-security, #crypto-bridges, #crypto-bridge-hacks, #cybersecurity-awareness, #cyber-attack, #crypto-attacks, #bridge-exploits, and more. This story was written by: @louistsu. Learn more about this writer by checking @louistsu's about page, and for more stories, please visit hackernoon.com. Crypto bridges concentrate significant risk in a single verification layer, making them attractive targets for attackers. Major exploits such as Ronin, Wormhole and Nomad exposed different technical weaknesses but shared the same structural problem: attackers convinced a bridge that assets existed when they did not. Audits remain essential, but security also depends on key management, monitoring and operational discipline. When an incident happens, four things matter most: speed, precise scope, verified information and preparation. The teams that demonstrate discipline in the first 48 hours are the ones that earn long-term trust.
August 11 · 6 min
24 Billion Stolen Passwords in One Database: Inside the Industrial Infostealer Economy
This story was originally published on HackerNoon at: https://hackernoon.com/24-billion-stolen-passwords-in-one-database-inside-the-industrial-infostealer-economy. A single exposed database held 24 billion stolen credentials — how the infostealer economy industrialized account takeover, and how to defend. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #cybersecurity, #password-security, #credential-stuffing, #infostealer, #data-breaches, #cybersecurity-awareness, #cyber-threats, #password-breached, and more. This story was written by: @nickmarsteller. Learn more about this writer by checking @nickmarsteller's about page, and for more stories, please visit hackernoon.com. Researchers discovered an exposed database containing 24 billion stolen credentials aggregated from infostealer malware, historic breaches, and cybercriminal infrastructure.

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