CVE-2026-42446
Medium
Description
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.
SeverityMedium
CVSS4.4
Exploit probability—
ProductM2team Nanazip
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- m2team nanazip6.0.1698.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| m2team nanazip | 5.0.1252.0 ≤ v < 6.0.1698.0 | 6.0.1698.0 |
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