Vulnerabilities
Microsoft patched CVE-2026-45659, a CVSS 8.8 deserialization RCE in SharePoint Server. The 'authenticated' precondition is barely a precondition — any account with Site Member, the lowest SharePoint role, can trigger it. Patch this week.
Data Breaches
Lithuania's Prosecutor General's Office says more than 600,000 records were pulled from the Centre of Registers using valid Migration Department login credentials issued queries from abroad. The registry itself was not breached — an authorized third party's login was.
Data Breaches
Three breach disclosures landed in one cycle — Radiology Associates of Richmond (266,183 people), DocketWise (143,480), and a vendor breach at the Oncology Institute. None is a novel attack. Together they map 2026's two structural failures: repeat victimization and third-party risk.
Nation-State Cyber Threats
Fox-IT disclosed RemotePE, a RAT the North Korea-linked Lazarus Group runs entirely in memory and never writes to disk. It is the final stage of a multi-stage chain, deployed only after the noisier RATs are deliberately cleaned up.
Supply Chain Attack
Socket disclosed TrapDoor, a coordinated attack that planted more than 34 malicious packages across npm, PyPI, and Crates.io at once. Its novel move: poisoned .cursorrules and CLAUDE.md files designed to trick a developer's AI coding assistant.
Vulnerabilities
Attackers are exploiting CVE-2026-26980, a CVSS 9.4 SQL-injection flaw in Ghost CMS, to hijack more than 700 websites — Harvard, Oxford, and DuckDuckGo among them — and serve visitors a fake-CAPTCHA ClickFix lure. The flaw was patched three months ago.
Artificial Intelligence (AI)
Anthropic says Project Glasswing's Claude Mythos Preview has surfaced more than 10,000 high- or critical-severity vulnerabilities in roughly a month. The numbers move the defender bottleneck: finding flaws is no longer the hard part — verifying, disclosing, and patching them is.
Supply Chain Attack
A coordinated attack on Packagist, the PHP package registry, poisoned eight Composer packages by hiding malicious code in package.json — the JavaScript manifest — instead of composer.json, exploiting the blind spot where PHP and JavaScript toolchains coexist but are reviewed separately.
Supply Chain Attack
GitHub has made npm staged publishing generally available. A direct publish no longer ships a package; the tarball waits in a stage queue until a maintainer passes a 2FA challenge to approve it. It is the first ecosystem-level structural answer to the 2026 supply-chain wave.
Policy & Government
Between May 19 and 22, Europol hosted the third and most successful operational week of Project A.S.S.E.T., bringing 31 countries and more than 40 agencies into one room to trace criminal money. The result: hundreds of bank accounts and crypto wallets identified.
Phishing
The FBI's IC3 has warned organizations about Kali365, a Telegram-sold phishing-as-a-service kit that runs device-code phishing against Microsoft 365 — stealing the OAuth tokens issued after the victim genuinely passes MFA on Microsoft's real sign-in page.
Supply Chain Attack
Researchers found more than 700 malicious version tags published across the Laravel-Lang PHP project on May 22-23, 2026 — yet the official repositories were never modified. The attacker pointed Git tags at a fork they controlled to drop a credential stealer.