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CVE-2026-42355— NanaZip: Uncontrolled recursion in NanaZip Electron ASAR parser causes stack exhaustion

Quick assessment

Affected
M2Team NanaZip
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NanaZip是M2-Team开源的一个压缩软件。 NanaZip 5.0.1252.0版本至6.0.1698.0之前版本存在安全漏洞，该漏洞源于Electron Archive解析器中nlohmann::json::parse和GetAllPaths函数递归无深度限制，可能导致堆栈耗尽和进程崩溃。

CVSS 3.3 · Low EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
M2Team NanaZip >= 5.0.1250.0, < 6.0.1698.0 affected
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I. Basic Information for CVE-2026-42355

Vulnerability Information
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Vulnerability Title
NanaZip: Uncontrolled recursion in NanaZip Electron ASAR parser causes stack exhaustion
Source: CVE Program / CVE List V5
Vulnerability 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 Electron Archive (ASAR) parser in NanaZip. When opening a crafted .asar file with deeply nested JSON in the header, both nlohmann::json::parse and the handler's GetAllPaths function recurse without depth limits, exhausting the thread stack and crashing the NanaZip process. This vulnerability is fixed in 6.0.1698.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
NanaZip 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NanaZip是M2-Team开源的一个压缩软件。 NanaZip 5.0.1252.0版本至6.0.1698.0之前版本存在安全漏洞，该漏洞源于Electron Archive解析器中nlohmann::json::parse和GetAllPaths函数递归无深度限制，可能导致堆栈耗尽和进程崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
M2Team NanaZip >= 5.0.1250.0, < 6.0.1698.0 -

II. Public POCs for CVE-2026-42355

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III. Intelligence Information for CVE-2026-42355

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Vendor Advisories for CVE-2026-42355 (1)

Same Patch Batch · M2Team · 2026-05-12 · 7 CVEs total

CVE-2026-42446 4.4 MEDIUM NanaZip: Stack out-of-bounds read in NanaZip ZealFS bitmap parser
CVE-2026-44215 4.4 MEDIUM NanaZip: Heap out-of-bounds write in NanaZip UFS directory parser
CVE-2026-42442 3.3 LOW NanaZip: Null-pointer dereference in NanaZip UFS parser when root inode is a symlink
CVE-2026-42444 3.3 LOW NanaZip: Unbounded resource consumption in NanaZip littlefs parser via attacker-controlled
CVE-2026-42443 3.3 LOW NanaZip: Integer divide-by-zero in NanaZip UFS inode offset calculation
CVE-2026-42445 3.3 LOW NanaZip: Uncontrolled recursion in NanaZip UFS directory traversal causes stack exhaustion

IV. Related Vulnerabilities

Same product: NanaZip
Same vendor: M2Team
Same weakness: CWE-674

V. Comments for CVE-2026-42355

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