CVE-2026-20679 Use after free in macOS
Processing a maliciously crafted file may cause unexpected app termination on macOS, requiring users to apply security updates.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-20679?
CVE-2026-20679 is a medium-severity use after free vulnerability in Apple Macos, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The issue was addressed with improved checks. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. Processing a maliciously crafted file may lead to unexpected app termination.
Which versions are affected by CVE-2026-20679?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2026-20679?
No fix has been published for CVE-2026-20679 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-20679 being exploited?
There is no known exploitation of CVE-2026-20679 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-p6hg-hpqv-cp2w.