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    CVE-2026-27709

    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.

    Published:Feb 25, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 25, 2026
    EPSS Score:0.00015
    CVSS Score:6.6

    Affected Products

    Vendor
    M2team
    Product
    Nanazip

    Exploits

    https://github.com/M2Team/NanaZip/security/advisories/GHSA-vr4w-xc78-w6fvhttps://github.com/M2Team/NanaZip/security/advisories/GHSA-vr4w-xc78-w6fv

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-54616 (CVSS 7.1) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 1.0.88.0 until stable…
    CVE-2026-55781 (CVSS 2.4) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's UFS…
    CVE-2026-55780 (CVSS 2.4) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's .NE…
    CVE-2026-55783 (CVSS 2.4) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's sev…
    CVE-2026-55782 (CVSS 2.4) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's Web…
    CVE-2026-47223 (CVSS 5.4) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 3.0.1000.0 to before …
    CVE-2026-47224 (CVSS 4.3) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 3.0.1000.0 to before …
    CVE-2026-47222 (CVSS 5.4) — NanaZip is the 7-Zip derivative intended for the modern Windows experience. From version 3.0.1000.0 to before …
    CVE-2026-44215 (CVSS 4.4) — NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds nu…
    CVE-2026-42445 (CVSS 3.3) — NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an uncontrolled recursion vulner…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High