CVE-2026-5426 zero-day: KnowledgeDeliver's shared ASP.NET machineKey → ViewState RCE → Godzilla in memory → Cobalt Strike via JS tampering. Hunting starts at Event ID 1316.
Microsoft's 2011 Secure Boot CAs expire June and October 2026. Secure Score check MC1293483 tracks fleet readiness; KB5025885 applies a two-phase rollover via the AvailableUpdates registry (0x140 → 0x280). BlackLotus-driven 2023 CA migration finally collides with the natural 15-year cert expiry.
Claude's new Microsoft Purview connector surfaces ~30 audit event types and on-demand chat/file access — but not prompts, model names, or tool calls. Claude Code goes through OpenTelemetry separately. Enterprise plan only; Team and consumer plans excluded.
After Rift, two more nginx CVEs landed in late May 2026: njs js_fetch_proxy heap overflow CVE-2026-8711 and a second rewrite-module heap overflow CVE-2026-9256. Both pre-auth, CVSS v4.0 9.2, config-specific. Concrete grep checks and patch paths.
Walking through Dirty Pipe (CVE-2022-0847) from a 2026 angle: one uninitialized pipe_buffer.flags bit kept PIPE_BUF_FLAG_CAN_MERGE alive into splice'd pages, plus patched-kernel checks for distros and containers.
Microsoft assigned CVE-2026-45585 to YellowKey: strip autofstx.exe from WinRE BootExecute and move TPM-only BitLocker to TPM+PIN. No patch ETA; Chaotic Eclipse claims a TPM+PIN bypass PoC.
DirtyDecrypt PoC proves local root via Linux RxGK page cache writes on Fedora, Arch, and Tumbleweed with CONFIG_RXGK=y. NVD describes CVE-2026-31635 only as a DoS; Ubuntu LTS and Debian stable stock kernels are not affected. Check commands and container mitigation included.
The May 19 Mini Shai-Hulud wave compromised 314 npm packages under @antv via the `atool` maintainer account. After rolling back lockfiles, payload entry points stay behind in .claude/settings.json SessionStart hooks, .vscode/tasks.json folderOpen tasks, systemd user services, and .github/workflows/codeql.yml. Concrete IoCs and the gh-token-monitor wipe ordering before rotation.
GitHub is investigating TeamPCP's $50K+ sale of ~4,000 internal repos. Count called 'directionally consistent' by GitHub; file list and the VS Code extension attack vector remain unverified.
Chaotic Eclipse's MiniPlasma takes SYSTEM on fully patched Windows 11 May 2026 by re-triggering CVE-2020-17103 in cldflt.sys, the same bug James Forshaw reported in 2020 and Microsoft supposedly fixed that December. Will Dormann confirmed the PoC works; the latest Insider Canary blocks it. No new CVE assigned yet, and the regression sits next to the actively exploited CVE-2025-62221 in the same driver.
SANS ISC (2026-04-30): a fake Homebrew Google sponsored ad drops MacSync Stealer through a 225-byte zsh that fans out into 1,448- and 2,647-byte stages, fakes a 'System Preferences' osascript dialog, and ships Keychain, browser data, crypto wallets, and `.ssh` to glowmedaesthetics[.]com over plain HTTP. IoCs, detection points, and MITRE ATT&CK mapping included.
Chaotic Eclipse released YellowKey and GreenPlasma PoCs one day after May 2026 Patch Tuesday. A USB-borne FsTx folder plus a Ctrl-key reboot drops cmd.exe inside WinRE on a BitLocker-protected machine. Covers WinRE-only behavior, the CTFMON SYSTEM elevation path, the RedSun silent-patch dispute, and what defenders can actually do while unpatched.
