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Digest · Friday

Security digest: August 21, 2026

1 known exploited (cisa kev) addition and 6 critical advisories.

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Take stock

  • Do you run any of these? Synacor Zimbra Collaboration Suite (ZCS). They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2026-08-24.
  • npm: 3 critical advisories (jsonata). Check with npm audit (or: npm ls <package>).
  • PyPI: 1 critical advisory (xinference). Check with pip-audit (or: pip show <package>).
  • Maven: 1 critical advisory (org.geotools.jdbc:gt-jdbc-postgis). Check with mvn dependency:tree -Dincludes=<groupId>:<artifactId>.
  • Composer (PHP): 1 critical advisory (phalcon/cphalcon). Check with composer 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-2026-73570Synacor Zimbra Collaboration Suite (ZCS)
Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability		2026-08-24

Critical advisories by ecosystem 6

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

npm 3

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

Composer (PHP) 1

Check: composer audit

Maven 1

Check: mvn dependency:tree -Dincludes=<groupId>:<artifactId>

PyPI 1

Check: pip-audit (or: pip show <package>)