CVE-2026-48095: Out-of-bounds Write

7-Zip is a file archiver with a high compression ratio. Versions 26.00 and prior contain a heap buffer overflow vulnerability caused by an under-allocation in the NTFS compressed stream buffer GetCuSize shift UB, potentially allowing attackers to cause arbitrary code execution or application...

The vulnerability of the CInStream::GetCuSize() function in the NTFS archiver 7-Zip allows a attacker to execute arbitrary code or cause a service failure.

The vulnerability of the CInStream::GetCuSize function in the 7-Zip NTFS archiver lies in the writing beyond buffer boundaries to memory. Exploiting this vulnerability could allow an attacker to execute arbitrary code or cause a service failure...