Use-after-free in macOS - CVE-2026-43704
Published: July 8, 2026
Vulnerability identifier: #VU137086
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-43704
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apple Inc.
Affected software:
macOS
macOS
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in web extensions when handling extension content. A remote attacker can trigger the vulnerable condition to cause a denial of service.
How to mitigate CVE-2026-43704
Install update from vendor's website.