CVE-2026-20666 Missing authorization in macOS
An app can access sensitive user data due to an authorization issue in macOS, requiring a system update to fix.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20666?
CVE-2026-20666 is a medium-severity missing authorization vulnerability in Apple Macos, published on 11 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An authorization issue was addressed with improved state management. This issue is fixed in macOS Tahoe 26.3. An app may be able to access sensitive user data.
Weakness: CWE-285
Which versions are affected by CVE-2026-20666?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2026-20666?
No fix has been published for CVE-2026-20666 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-20666 being exploited?
There is no known exploitation of CVE-2026-20666 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-84wm-58x3-8fvc.