Out-of-bounds write in macOS - CVE-2026-86876
Published: September 14, 2026
Vulnerability identifier: #VU149744
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-86876
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to an out-of-bounds write in CoreMedia when processing media content. A local user can trigger the out-of-bounds write to bypass implemented security restrictions.
Affected software
macOS
How to mitigate CVE-2026-86876
Install update from vendor's website.
macOS - addressed in versions 26.7 25G229, 15.8 24H23