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Digest · Wednesday

Security digest: July 1, 2026

1 known exploited (cisa kev) addition and 5 critical advisories.

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Take stock

  • Do you run any of these? Microsoft SharePoint Server. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2026-07-04.
  • Go: 3 critical advisories (github.com/rancher/fleet, github.com/rancher/rancher). Check with govulncheck ./....
  • npm: 1 critical advisory (ghost). Check with npm audit (or: npm ls <package>).
  • Hex (Erlang/Elixir): 1 critical advisory (quic). Check with mix hex.audit.
  • None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

Known exploited (CISA KEV) 1

Added to CISA’s catalog on this day: confirmed exploitation in the wild. Due date = CISA’s deadline for US federal agencies.

CVEProduct and flawCISA due
CVE-2026-45659Microsoft SharePoint Server
Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability Ransomware		2026-07-04

Critical advisories by ecosystem 5

GitHub-reviewed advisories rated critical, published this day (Pacific time).

Go 3

Check: govulncheck ./...

Hex (Erlang/Elixir) 1

Check: mix hex.audit

npm 1

Check: npm audit (or: npm ls <package>)