CVE-2026-27709

EUVD-2026-8767
NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0, NanaZip’s `.NET Single File Application` parser has an out-of-bounds read vulnerability in manifest parsing. A crafted bundle can provide a malformed `RelativePathLength` so the parser constructs a `std::string` from memory beyond `HeaderBuffer`, leading to crash and potential in-process memory disclosure. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.6 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
m2teamnanazip
5.0.1252.0 ≤
𝑥
< 6.0.1638.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/M2Team/NanaZip/security/advisories/GHSA-vr4w-xc78-w6fv
https://github.com/M2Team/NanaZip/security/advisories/GHSA-vr4w-xc78-w6fv