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 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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/M2Team/NanaZip/commit/ad62e3b4970b9f01e924c99094d6fed7a42f849a
https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0
https://github.com/M2Team/NanaZip/security/advisories/GHSA-ppm9-5267-rq72
https://github.com/M2Team/NanaZip/security/advisories/GHSA-ppm9-5267-rq72

Configurations

No configuration.

History

13 Jul 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://github.com/M2Team/NanaZip/security/advisories/GHSA-ppm9-5267-rq72 -~~	() https://github.com/M2Team/NanaZip/security/advisories/GHSA-ppm9-5267-rq72 -

10 Jul 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-10 17:16

Updated : 2026-07-13 19:17

NVD link : CVE-2026-55780

Mitre link : CVE-2026-55780

CVE.ORG link : CVE-2026-55780

JSON object : View

Products Affected

No product.

CWE

CWE-248

Uncaught Exception

CWE-400

Uncontrolled Resource Consumption

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