Security Advisory

CVE-2026-55780

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-10 16:49:26

Last updated 2026-07-13 18:14:24

Assigner GitHub_M

CVSS score 2.4

State PUBLISHED

Description

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's .NET single-file bundle handler in NanaZip.Codecs.Archive.DotNetSingleFile.cpp sizes its extraction buffer from the bundle entry Size field, which is only checked for sign and is not validated against the real file size. A crafted bundle can cause an attacker-chosen allocation inside Extract, where std::bad_alloc or std::length_error can escape across the COM STDMETHODCALLTYPE boundary and crash the process. This issue is fixed in version 6.5.1749.0.

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