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Outlook.com is rejecting email from domains without DMARC
Since November 5, Outlook.com and Hotmail have been bouncing mail from domains with no DMARC record, small senders included. What changed, and the one-record fix.
New
The latest blog posts to take off on Hacker News. 4,439 posts.
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Claude Code's "Don't Ask Again" exposes passwords in 1,122 public GitHub files
Secure everything coding agents build, use, and ship - prevent risk before code exists, AutoFix the backlog, and protect the coding agents and supply chain.
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Every Mac comes with an (undocumented) family member classifier
Every Mac since macOS 13 (2022) ships a pair of daemons whose only purpose in life is to build a graph about who you are, who you know, how those people are related to you and to each other, how you communicate with them, where you go, what you do and when. In this post, we look into how this system works and give you…
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Firecracker VM Escape: PwnEscape Part 2
Firecracker is supposed to keep untrusted code inside a microVM. We escaped it and achieved code execution as root on the host.
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Restaurant Delivery Payment-Skimming Campaign
InfoHawk research has uncovered a network of 820 suspicious restaurant domains impersonating major US chains, including Jersey Mike's, Jimmy John's, Firehouse Subs, Chipotle, and Dave's Hot Chicken. Some are running sophisticated payment-skimming attacks that capture credit card information and ask customers for their…
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Motorola Signature 27 with GrapheneOS support
Meet motorola signature 27, Motorola's most advanced flagship smartphone ever with next-gen AI, industry-leading tech, & a distnctive design.
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OpenSSH 10.6p2 Critical workaround for alpine without PAM
OpenSSH release notes
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GPT-6 Astra covertly underperforms on safety research
Research on aligning AI with human values and intent, and reports documenting model failures.
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A thousand fewer paths to root
OpenAI built an autonomous pipeline that found, validated, and generated patches for 948 local privilege-escalation vulnerabilities in the Linux kernel.
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Ubuntu still has not released patch for Linux 0day RCE in almost 3 weeks
No patched kernels are available yet for 22.04, 24.04, or 26.04 despite a CVSS 9.8 rating.
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Trigger.dev customer environment variables exposed
An attacker gained unauthorized access to environment variables for a subset of organizations. We've blocked the exploit and emailed all impacted account owners with steps to mitigate.
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Brazilian Court Sanctions Lawyers for Prompt Injection in Court Filing
Two lawyers hid a white-on-white instruction inside a court filing telling the AI to go easy on their case. The court's AI caught it. The fine was $16,000.
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TCP Use-After-Free: CVE-2026-98432 / CVSS 9.8
CVE-2026-98432 is a CVSS 9.8 remote use-after-free in Linux's IPv4 TCP handshake, fixed upstream Oct 15. RHEL has fixes; Ubuntu's are still in testing.
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Malware uses LLMs to rank victims by how much they're worth
The self-deleting VOLTA infostealer steals credentials, sessions, and cryptocurrency wallets. Then, it uses LLMs to profile victims and rank their most valuable assets.
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Do the math: How we took over ChatGPT accounts
By bypassing ChatGPT's sandbox and content security policy, our research team was able to take over anyone's account simply by sending them a link.
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Understanding Email Encryption (2025)
A comprehensive overview of how email is encrypted, the benefits, and the trade-offs.
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Azure's Weakest Link – Five Full Cross-Tenant Compromises
In my previous blog posts, Azure’s Weakest Link? and Azure’s Weakest Link - Full Cross-Tenant Compromise, I gave an overview of the severely insecure architecture behind API Connections in Azure, a part of Azure Logic Apps, and an instance of a full cross-tenant compromise using these inherent flaws. Now I am back…
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Backdoor in Claude Code for VS Code extension on the Cursor Marketplace
Phorion has detected a backdoor in the official Claude Code for VS Code extension bundle on the Cursor Marketplace that drops a persistent SSH backdoor across macOS, Linux, and Windows. This write-up …
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CVE-2026-98432: 9.8 CVE affecting all Ubuntu versions
Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things.
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Chained PHP2Shell exploit roots 25 servers, including US Government servers
Custom PHP2Shell Exploit Chained with Kernel LPE to Root Versions of Palo Alto Networks PAN-OS Firewalls in the Wild
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Tailscale SSH: Investigation and remediation update
Securely connect to anything on the internet with Tailscale. Built on WireGuard®️, Tailscale enables you to make finely configurable connections, secured end-to-end according to zero trust principles, between any resources on any infrastructure.
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PHP2Shell: Exploitation attempts and remediation trends
Wiz research has been monitoring PHP2Shell exploitation attempts, but none have succeeded so far. We examine the techniques used, what prevented the attacks from completing and how observed exposure has changed since disclosure.
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Cross-request KV cache exposure in the GLM-5.3 Workers AI model (155 responses)
A configuration mismatch in GLM 5.3 on Workers AI triggered an SGLang bug that exposed KV cache pages across requests. Here is how we addressed the issue.
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Concerning behavior from a popular open-weight AI model
Discover how untrusted open-weight AI models can potentially leak data, even when self-hosted. Learn the security risks and how to protect your enterprise.
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Securing our frontier model training environment
OpenAI explains how we strengthened containment for frontier model training and evaluation, including offline environments and high-compute red-teaming.
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Today, we hacked what we'd set out to hack: the iPhone
Today, we hacked what we'd set out to hack: the iPhone.