CVE-2026-42446

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a stack-based out-of-bounds read exists in the ZealFS filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted ZealFS v1 filesystem image. An attacker-controlled BitmapSize field in the file header drives an unbounded loop that reads past the end of a stack-allocated ZEALFS_V1_HEADER structure. This vulnerability is fixed in 6.0.1698.0.

CVSS v3 4.4 MEDIUM

4.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 2.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/M2Team/NanaZip/security/advisories/GHSA-4c79-hfr4-mqv9	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:*

History

26 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) NanaZip es un archivador de archivos de código abierto. Desde 5.0.1252.0 hasta antes de 6.0.1698.0, existe una lectura fuera de límites basada en pila en el analizador de imágenes de sistema de archivos ZealFS en NanaZip. La vulnerabilidad se activa al abrir una imagen de sistema de archivos ZealFS v1 manipulada. Un campo BitmapSize controlado por el atacante en la cabecera del archivo provoca un bucle ilimitado que lee más allá del final de una estructura ZEALFS_V1_HEADER asignada en la pila. Esta vulnerabilidad está corregida en 6.0.1698.0.

Information

Published : 2026-05-12 20:16

Updated : 2026-10-26 18:10

NVD link : CVE-2026-42446

Mitre link : CVE-2026-42446

CVE.ORG link : CVE-2026-42446

JSON object : View

Products Affected

m2team

nanazip

CWE

CWE-125

Out-of-bounds Read

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