CVE-2026-42445: CWE-674: Uncontrolled Recursion in M2Team NanaZip
NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an uncontrolled recursion vulnerability exists in the UFS/UFS2 filesystem image parser in NanaZip. The function GetAllPaths recurses into subdirectories without any depth limit or visited-inode tracking. A crafted UFS image with a deep directory tree or an inode cycle causes stack exhaustion, crashing the NanaZip process. This vulnerability is fixed in 6.0.1698.0.
AI Analysis
Technical Summary
CVE-2026-42445 is an uncontrolled recursion vulnerability in the UFS/UFS2 filesystem image parser of NanaZip, an open source file archiver. Specifically, the GetAllPaths function recursively traverses subdirectories without any depth limit or visited inode tracking, which can lead to stack exhaustion when processing crafted UFS images with deep or cyclic directory structures. This results in a crash of the NanaZip process, constituting a denial of service condition. The vulnerability affects versions from 5.0.1252.0 up to but not including 6.0.1698.0. The issue is resolved in NanaZip 6.0.1698.0.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by crashing the NanaZip application when it processes a maliciously crafted UFS filesystem image. There is no impact on confidentiality or integrity, and no known exploitation in the wild has been reported. The CVSS score of 3.3 reflects a low severity primarily due to the limited impact scope and the requirement for local access to trigger the vulnerability.
Mitigation Recommendations
Users should upgrade NanaZip to version 6.0.1698.0 or later, where this uncontrolled recursion vulnerability is fixed. Since the vulnerability is resolved in this version, applying the official update fully mitigates the risk. No additional mitigation steps are indicated.
CVE-2026-42445: CWE-674: Uncontrolled Recursion in M2Team NanaZip
Description
NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an uncontrolled recursion vulnerability exists in the UFS/UFS2 filesystem image parser in NanaZip. The function GetAllPaths recurses into subdirectories without any depth limit or visited-inode tracking. A crafted UFS image with a deep directory tree or an inode cycle causes stack exhaustion, crashing the NanaZip process. This vulnerability is fixed in 6.0.1698.0.
CVSS v3.1
Score 3.3low
Affected software
pkg:github/m2team/NanaZipRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42445 is an uncontrolled recursion vulnerability in the UFS/UFS2 filesystem image parser of NanaZip, an open source file archiver. Specifically, the GetAllPaths function recursively traverses subdirectories without any depth limit or visited inode tracking, which can lead to stack exhaustion when processing crafted UFS images with deep or cyclic directory structures. This results in a crash of the NanaZip process, constituting a denial of service condition. The vulnerability affects versions from 5.0.1252.0 up to but not including 6.0.1698.0. The issue is resolved in NanaZip 6.0.1698.0.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by crashing the NanaZip application when it processes a maliciously crafted UFS filesystem image. There is no impact on confidentiality or integrity, and no known exploitation in the wild has been reported. The CVSS score of 3.3 reflects a low severity primarily due to the limited impact scope and the requirement for local access to trigger the vulnerability.
Mitigation Recommendations
Users should upgrade NanaZip to version 6.0.1698.0 or later, where this uncontrolled recursion vulnerability is fixed. Since the vulnerability is resolved in this version, applying the official update fully mitigates the risk. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-27T13:55:58.692Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a03813ccbff5d861012f66d
Added to database: 05/12/2026, 19:36:28 UTC
Last enriched: 05/20/2026, 18:50:20 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 48
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.