Attackers are using this Critical severity

dyld flaw used in targeted attacks

A flaw in dyld, part of macOS. An attacker with memory write capability may be able to execute arbitrary code. Apple says this may have been exploited in targeted attacks, and CISA lists it as actively exploited.

On a Mac
Every Mac still on an affected version. The fix comes with the macOS update.
The fix
  • macOS 26.3
Attacks
In CISA’s catalog of exploited flaws since February 12, 2026.
CVE
CVE-2026-20700
Sources

From the Briefing, updated 20 minutes ago.

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Version 1.0.1, Oct 26
macOS 14 Sonoma or later
Apple silicon and Intel, notarized by Apple