CVE-2026-20630: 
macOS vulnerability analysis and mitigation

CVE-2026-20630 is a permissions issue in the LaunchServices component of Apple macOS Tahoe that allows a locally installed app to access protected user data. The vulnerability was disclosed on February 11, 2026, as part of Apple's macOS Tahoe 26.3 security update. It affects macOS Tahoe versions prior to 26.3 and was reported by an anonymous researcher. The vulnerability carries a CVSS v3.1 base score of 5.5 (Medium) (Apple Advisory).

The root cause is classified as CWE-277 (Insecure Inherited Permissions), where the LaunchServices component failed to enforce adequate access restrictions on protected user data. Apple addressed the issue by applying additional restrictions to the affected code path. The attack vector is local, requiring low privileges and no user interaction, meaning a malicious app already installed on the system can silently access protected data without further user consent (Apple Advisory).

Successful exploitation allows a malicious application to access protected user data that should be restricted by the operating system's permission model. The impact is limited to confidentiality — there is no integrity or availability impact. The vulnerability does not enable remote exploitation or direct lateral movement, but unauthorized access to protected data could expose sensitive personal information stored on the affected macOS system (Apple Advisory).

Apple has addressed this vulnerability in macOS Tahoe 26.3, released February 11, 2026. Users should update to macOS Tahoe 26.3 or later via System Settings > General > Software Update. No configuration-based workaround is available; upgrading to the patched release is the only recommended remediation (Apple Advisory).