{"api_version":"1","generated_at":"2026-07-11T08:02:14+00:00","cve":"CVE-2026-55780","urls":{"html":"https://cve.report/CVE-2026-55780","api":"https://cve.report/api/cve/CVE-2026-55780.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-55780","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55780"},"summary":{"title":"NanaZip: Uncaught exception / unbounded allocation in NanaZip .NET single-file Extract() via unvalidated entry Size","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. 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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.","Type":"Description","Title":"NanaZip: Uncaught exception / unbounded allocation in NanaZip .N"}]}}}