GUARDED 1 min read 1 Jun 2026

Cyber Threat Watchlist for 2026-06-01

A quiet weekend backlog with one confirmed actively exploited issue that needs attention now, Marimo CVE-2026-39987 on the CISA Known Exploited Vulnerabilities list, alongside routine Google Chrome and developer-tooling patching.

Key findings
01
Cyber Threat Watchlist for 2026-06-01
INFO

Cyber Threat Watchlist for 2026-06-01

  • 🟡 Low-signal day: little new material, but one tracked item is under active exploitation.
  • The bullets below are what we are watching; the Marimo item warrants action now.
  • nvd.nist.gov, thehackernews.com: Marimo CVE-2026-39987 is on CISA KEV, with reporting of LLM-agent post-exploitation activity. If you run Marimo notebooks anywhere, patch to the fixed release now and keep them off the public internet.
  • nvd.nist.gov: Google Chrome use-after-free fixes CVE-2026-10002 (PDFium) and CVE-2026-10012 (Skia), resolved in 148.0.7778.216. Check that managed fleets, VDI pools and unmanaged endpoints are on that build or later.
  • github.com: praisonai-platform has patched workspace-boundary and privilege-promotion issues. If it runs in labs or internal tooling, move to the latest release and review who can promote workspace members.

Most likely to escalate: Marimo CVE-2026-39987, already KEV-listed and exploited, so treat unpatched instances as exposed today rather than tomorrow.

Full brief resumes when material change is detected.

google-chromemarimopatch-management

Act on this brief

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