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CVE-2026-55780

LOW
2.4
CVSS 4.0
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. 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.

Metadata

CVE ID
CVE-2026-55780
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-17 14:40 UTC
Published
2026-07-10 16:49 UTC
Last updated
2026-07-10 16:49 UTC
Primary CWE
CWE-248
CWE-248: Uncaught Exception
Vendor / Product
M2Team / NanaZip
Sources
cve.org  ·  NVD

Severity & Metrics

2.4 LOW CVSS 4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
M2Team NanaZip — < 6.5.1749.0
Weakness (CWE)
CWESourceDescription
CWE-248 cna CWE-248: Uncaught Exception
CWE-400 cna CWE-400: Uncontrolled Resource Consumption
CVSS scores (1)
ScoreSeverityVersionSourceVector
2.4 LOW 4.0 cna CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References (3)
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