Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| M2Team | Nanazip | >= 5.0.1252.0, < 6.0.1698.0 |
Related Weaknesses (CWE)
References
- https://github.com/M2Team/NanaZip/security/advisories/GHSA-4c79-hfr4-mqv9MitigationVendor Advisory
FAQ
What is CVE-2026-42446?
CVE-2026-42446 is a vulnerability with a CVSS score of 4.4 (MEDIUM). 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 w...
How severe is CVE-2026-42446?
CVE-2026-42446 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42446?
Check the references section above for vendor advisories and patch information. Affected products include: M2Team Nanazip.