Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| M2Team | Nanazip | >= 5.0.1252.0, < 6.0.1638.0 |
Related Weaknesses (CWE)
References
- https://github.com/M2Team/NanaZip/security/advisories/GHSA-vr4w-xc78-w6fvExploitVendor Advisory
- https://github.com/M2Team/NanaZip/security/advisories/GHSA-vr4w-xc78-w6fvExploitVendor Advisory
FAQ
What is CVE-2026-27709?
CVE-2026-27709 is a vulnerability with a CVSS score of 6.6 (MEDIUM). 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 vulner...
How severe is CVE-2026-27709?
CVE-2026-27709 has been rated MEDIUM with a CVSS base score of 6.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27709?
Check the references section above for vendor advisories and patch information. Affected products include: M2Team Nanazip.