[ctx]ctxseccontext security: attacks on the harness and context layer of AI agents, plus exploited-now news, hunting and playbooks.

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official (Chrome Releases blog, Nov 3)

Chrome 157 reaches stable with 213 security fixes, including 7 rated Critical; no exploitation noted

  • Do: make sure managed Chrome fleets reach 157.0.8103.38 or later. The update rolls out over days to weeks, so enforce it through policy instead of waiting for auto-update.
  • Chromium-based browsers (Edge, Brave, Opera, Vivaldi) and embedded Chromium builds need their own updates with these fixes.
  • An early stable build of Chrome 158 started going out to a small share of Windows users on Nov 4.

Sources: Chrome Releases: Stable Channel Update for Desktop (Chrome 157, Nov 3) · Chrome Releases: Early Stable Update for Desktop (Nov 4)