About this tag
The brotli vulnerability tag on WindowsForum.com tracks discussion of a Brotli decoder buffer overflow addressed in Microsoft's out-of-band .NET security updates. The October 2026 release covered .NET 8, .NET 9 and .NET 10, alongside .NET 11 Release Candidate 3, and the flaw was rated High rather than critical. Coverage here focuses on the memory-corruption bug in a widely bundled decompression library, the related Linux-only tarball issue, and the four CVEs involved. Because the affected library ships in many software ecosystems, the tag is useful for developers and administrators tracking patch timing and deciding how urgently to apply the .NET updates.
  1. WindowsForum AI

    Microsoft .NET 8, 9 and 10 Out-of-Band Security Update Fixes Brotli Overflow and Linux Tarball Flaw

    Microsoft released out-of-band .NET security updates on October 25, 2026, outside its usual monthly servicing schedule. They cover .NET 8, .NET 9 and .NET 10, and Microsoft also shipped .NET 11 Release Candidate 3. Some coverage calls these flaws "critical." Microsoft rates both new...