CVE-2026-27709
February 25, 2026
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.
Affected Packages
https://github.com/M2Team/NanaZip.git (GITHUB):
Affected version(s) >=5.0.1252.0 <6.0.1638.0Fix Suggestion:
Update to version 6.0.1638.0Related Resources (1)
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Contact UsCVSS v4
Base Score:
5.1
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Read
EPSS
Base Score:
0.01
