Nanazip
CVE-2026-26282
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Buffer over-read prevention
|
| Impact | CVSS 6.6 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: Low. User interaction: Required. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
NanaZip versions 5.0.1252.0 through 6.0.1629.0 contain an out-of-bounds heap read in the .NET Single File bundle parser that can crash the application or expose sensitive heap memory when processing malicious archive files. A local attacker with user privileges can exploit this vulnerability by crafting a specially formatted file, and public exploit code is currently available. No patch is yet available for affected users.
Earlier versions of this analysis (1)
NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, NanaZip has an out-of-bounds heap read in .NET Single File bundle header parser due to missing bounds check. Opening a crafted file with NanaZip causes a crash or leaks heap data to the user. [CVSS 6.6 MEDIUM]
RemediationAI
Monitor vendor advisories for a patch.
Affects your stack
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Technical ContextAI · show details
Classified as CWE-126 (Buffer Over-read). Affects Nanazip. NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, NanaZip has an out-of-bounds heap read in .NET Single File bundle header parser due to missing bounds check. Opening a crafted file with NanaZip causes a crash or leaks heap data to the user. Version 6.0.1630.0 patches the issue.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, NanaZip has an out-of-bounds heap read in .NET Single File bundle header parser due to missing bounds check. Opening a crafted file with NanaZip causes a crash or leaks heap data to the user. Version 6.0.1630.0 patches the issue.
Executive ViewAI
Organizations using version 5.0.1252.0 and should be aware of notable risk from CVE-2026-26282 rated CVSS 6.6. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)GitHub Advisory
Nanazip versions up to 6.0.1630.0 is affected by loop with unreachable exit condition (infinite loop) (CVSS 7.5).
NanaZip versions 5.0.1252.0 through 6.5.1637.0 contain an out-of-bounds memory access flaw in the UFS file parser that c
Out-of-bounds memory read in NanaZip versions 5.0.1252.0 through 6.0.1637.x allows local authenticated attackers to disc
NanaZip versions 5.0.1252.0 through 6.0.1629.0 are vulnerable to denial of service through malformed ROMFS archives that
NanaZip versions 5.0.1252.0 through 6.5.1637.x contain an integer underflow in the .NET Single File Application parser t
Heap out-of-bounds read in NanaZip's SquashFS LZ4 decompression handler exposes adjacent heap memory contents when a use
A one-byte heap out-of-bounds null write (CWE-787) in NanaZip's UFS/UFS2 filesystem image parser allows a crafted .ufs,
Opening a crafted ZealFS v1 filesystem image in NanaZip builds from 5.0.1252.0 up to (but not including) 6.0.1698.0 trig
Process crash via uncaught C++ exception in NanaZip's .NET single-file bundle handler affects all versions prior to 6.5.
Stack exhaustion in NanaZip's UFS/UFS2 filesystem image parser crashes the application when a user opens a specially cra
Memory exhaustion in NanaZip's littlefs filesystem image parser (versions 5.0.1252.0 through before 6.0.1698.0) allows a
Integer divide-by-zero in NanaZip's UFS/UFS2 filesystem image parser crashes the application when a user opens a special
Exploit-DB