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 passing Indices as NULL and NumItems as 0xFFFFFFFF. This causes a NULL pointer dereference in the standard Test archive or Extract all code path for WebAssembly, ElectronAsar, Zealfs, Romfs, Ufs, Littlefs, and DotNetSingleFile archives, resulting in a process crash. This issue is fixed in version 6.5.1749.0.

CVSS

No CVSS.

References

Link	Resource
https://github.com/M2Team/NanaZip/commit/5d74d90b737ac7096e5d944a5a3070c5c6a8f894
https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0
https://github.com/M2Team/NanaZip/security/advisories/GHSA-q67r-9cfh-xc29
https://github.com/M2Team/NanaZip/security/advisories/GHSA-q67r-9cfh-xc29

Configurations

No configuration.

History

10 Jul 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://github.com/M2Team/NanaZip/security/advisories/GHSA-q67r-9cfh-xc29 -~~	() https://github.com/M2Team/NanaZip/security/advisories/GHSA-q67r-9cfh-xc29 -

10 Jul 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-10 17:17

Updated : 2026-07-10 19:17

NVD link : CVE-2026-55783

Mitre link : CVE-2026-55783

CVE.ORG link : CVE-2026-55783

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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