CVE-2026-55781-poc

CVE-2026-55781 — NanaZip UFS 파서 DoS NanaZip의 UFS 핸들러에서 공격자가 제어하는 fsbsize 필드를 통해 발생하는 무제한 메모리 할당. 요약 필드| 값 ---|--- CVE| CVE-2026-55781 권고| GHSA-m34h-jf84-m74h 벤더| M2Team / NanaZip 영향 받는 버전| NanaZip = 6.5 Preview 6.5.1742.0 수정 버전| 6.5.1749.0 분류| 서비스 거부 CWE-789: 과도한 크기 값으로 인한 메모리 할당 플랫폼| Windows 작성자...

CVE-2026-55781-poc

CVE-2026-55781 — DoS del analizador UFS de NanaZip Asignación de memoria sin límites en el controlador UFS de NanaZip mediante un campo fsbsize controlado por el atacante. Resumen Campo| Valor ---|--- CVE| CVE-2026-55781 Aviso| GHSA-m34h-jf84-m74h Proveedor| M2Team / NanaZip Afectado| NanaZip = 6...

Exploit for CVE-2026-55781

markdown CVE-2026-55781 — NanaZip UFS Parser DoS Unbounded...

The vulnerability of the Lz4Decode function in the NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp component of the SquashFS compiler, a 7-Zip-based archive compressor, allows a hacker to disclose protected information and cause a service failure.

The vulnerability of the Lz4Decode function in the NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp component of the SquashFS compressor, a 7-Zip-based archive compressor, involves reading data beyond the allowed range of memory. Exploiting this vulnerability can allow an attacker to...

CVE-2026-54616

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4decompresssafe...

CVE-2026-54616

NanaZip (a 7-Zip derivative for modern Windows) is affected by a heap out-of-bounds read in the SquashFS LZ4 decompressor (Lz4Decode in SquashfsHandler.cpp). The root cause is that the function only rejects a zero return from LZ4_decompress_safe, while malformed input produces a negative error va...

CVE-2026-54616 NanaZip: Heap out-of-bounds read in NanaZip SquashFS LZ4 decompressor via unchecked negative return value

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4decompresssafe...

CVE-2026-54616 NanaZip: Heap out-of-bounds read in NanaZip SquashFS LZ4 decompressor via unchecked negative return value

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4decompresssafe...

EUVD-2026-63481

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4decompresssafe...

CVE-2026-54616 NanaZip: Heap out-of-bounds read in NanaZip SquashFS LZ4 decompressor via unchecked negative return value

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4decompresssafe...

NanaZip 6.5 Denial of Service

NanaZip version 6.5 suffers from a denial of service vulnerability. A crafted .NET single-file bundle triggers an uncaught exception / unbounded allocation in the DotNetSingleFile handler's Extract. Exploit Title: NanaZip 6.5 - DoS Date: 2026-07-17 Exploit Author: Pig-Tail Jorge González Milla...

PT-2026-79050

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4 decompress saf...

CVE-2026-54616: Out-of-bounds Read

NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable version 6.0.1698.0 and preview version 6.5.1742.0, the Lz4Decode function in NanaZip.Core/SevenZip/CPP/7zip/Archive/SquashfsHandler.cpp rejects only a zero return from LZ4decompresssafe...

NanaZip 6.5 - DoS

Exploit Title: NanaZip 6.5 - DoS Date: 2026-07-17 Exploit Author: Pig-Tail Jorge González Milla Vendor Homepage: https://github.com/M2Team/NanaZip Software Link: https://github.com/M2Team/NanaZip/releases Version: NanaZip 3 GiB. All superb...

NanaZip 6.5 - DoS

Exploit Title: NanaZip 6.5 - DoS Date: 2026-07-17 Exploit Author: Pig-Tail Jorge González Milla Vendor Homepage: https://github.com/M2Team/NanaZip Software Link: https://github.com/M2Team/NanaZip/releases Version: NanaZip = 6.5 Preview 6.5.1742.0 fixed 6.5.1749.0 Tested on: Windows CVE:...

CVE-2026-55782

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's WebAssembly archive handler in NanaZip.Codecs.Archive.WebAssembly.cpp allocates buffers from attacker-controlled 32-bit section and custom-name length fields without validating them against...

CVE-2026-55783

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's seven in-house IInArchive handlers in NanaZip.Codecs unconditionally dereference the caller-supplied Indices array inside Extract when the archive engine signals extract everything by passin...

CVE-2026-55781

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's UFS and FFS image handler in NanaZip.Codecs.Archive.Ufs.cpp validates the superblock block size only against the MINBSIZE lower bound and does not validate the fsfsize fragment size, allowin...

CVE-2026-55780

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 validat...

CVE-2026-55781 NanaZip: Unbounded memory allocation (DoS) in NanaZip UFS parser via unvalidated fs_bsize/fs_fsize superblock fields

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's UFS and FFS image handler in NanaZip.Codecs.Archive.Ufs.cpp validates the superblock block size only against the MINBSIZE lower bound and does not validate the fsfsize fragment size, allowin...