PT-2026-22043 · Nanazip · Nanazip

Ho-9 · CVE-2026-27709 · Published 2026-02-25 · Updated 2026-02-26

Positive Technologies (AI Summary)

CVSS v3.1

6.6

Medium

Base vector

AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions NanaZip versions 5.0.1252.0 through 6.0.1637.0 and 6.5.1637.0

Description NanaZip, an open source file archive, contains a flaw in its .NET Single File Application parser. Specifically, the parser exhibits an out-of-bounds read condition during manifest parsing. A specially crafted file can provide a malformed RelativePathLength value, causing the parser to construct a std::string using memory beyond the HeaderBuffer. This can lead to a program crash and potential in-process memory disclosure.

Recommendations Update to NanaZip version 6.0.1638.0 or 6.5.1638.0.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-27709

GHSA-VR4W-XC78-W6FV

Affected Products

Nanazip

References · 7

• 🔥 https://github.com/M2Team/NanaZip/security/advisories/GHSA-vr4w-xc78-w6fv · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27709.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-27709 · Security Note
• https://osv.dev/vulnerability/CVE-2026-27709 · Vendor Advisory
• https://t.me/CVEtracker/45789 · Telegram Post
• https://twitter.com/CVEnew/status/2027004257979777303 · Twitter Post
• https://t.me/cveNotify/153275 · Telegram Post