Nanazip
CVE-2026-27114
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessCraft malicious ROMFS archive with circular NextOffset
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ExploitUpload or distribute archive file
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ExecutionNanaZip parser enters infinite loop
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ImpactApplication becomes unresponsive and crashes
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Loop termination conditions
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | NanaZip versions 5.0.1252.0 through 6.0.1629.x must be installed. User must attempt to extract or parse a specially crafted ROMFS archive file. No authentication or special configuration required. |
| Impact | CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. 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 up to 6.0.1630.0 is affected by loop with unreachable exit condition (infinite loop) (CVSS 7.5).
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability (CWE-835: Loop with Unreachable Exit Condition (Infinite Loop)) affects Nanazip. NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, circular NextOffset chains cause an infinite loop in the ROMFS archive parser. 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:N/AC:L/PR:N/UI:N/S:U/C:N/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, circular NextOffset chains cause an infinite loop in the ROMFS archive parser. Version 6.0.1630.0 patches the issue.
Executive ViewAI
Nanazip versions through 6.0.1630.0 contain a critical infinite loop vulnerability that can be triggered remotely to cause denial of service, potentially disrupting operations for any organization using this compression utility. With public exploits available and no patch currently available, this requires immediate action to identify affected systems and implement workarounds.
Disable Nanazip or restrict its use to trusted archives only; implement network segmentation to limit exposure from untrusted file sources; configure monitoring/alerting for process hangs or resource exhaustion; restrict file processing permissions; consider deploying endpoint detection and response (EDR) solutions to detect infinite loop execution patterns; use alternative compression utilities with equivalent functionality; implement application whitelisting to prevent exploitation vectors.
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 5.0.1252.0 through 6.0.1629.0 contain an out-of-bounds heap read in the .NET Single File bundle parser
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