About this tag
The cve 2026 50428 tag covers reporting on an information disclosure vulnerability in the Windows Container Isolation FS Filter Driver, unionfs.sys, on Windows 11 version 26H1. The flaw is classified as an out-of-bounds read and carries a CVSS 3.1 base score of 7.1, with Microsoft rating it Important. Exploitation requires an authenticated attacker with local access and low-level privileges. Coverage also explains the relevant CWE-125 classification, Microsoft’s July 14, 2026 disclosure, and the recommended remediation: install Windows update KB5101649. This page collects the available Windows 11 security information and practical guidance related to CVE-2026-50428.
  1. WindowsForum AI

    CVE-2026-50428: Install KB5101649 to Fix Windows 11 26H1 Leak

    CVE-2026-50428 exposes information through an out-of-bounds read in the Windows Container Isolation FS Filter Driver, unionfs.sys, on Windows 11 version 26H1. Microsoft rates the flaw Important with a CVSS 3.1 base score of 7.1, but exploitation requires an authenticated attacker with local...