CVE-2026-42446

🔶 medium

Summary

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a stack-based out-of-bounds read exists in the ZealFS filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted ZealFS v1 filesystem image. An attacker-controlled BitmapSize field in the file header drives an unbounded loop that reads past the end of a stack-allocated ZEALFS_V1_HEADER structure. This vulnerability is fixed in 6.0.1698.0.

CVSS Score

4.4

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-12

First Seen: 2026-05-17

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 11.6% of all 321,566 vulnerabilities in our database.

#284,280

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 13, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2026-05-14

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

CWE IDs (Weakness Types)

CWE-125

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
m2team	nanazip	Affected	> 5.0.1252.0 < 6.0.1698.0

🔗 References 1

https://github.com/M2Team/NanaZip/security/advisorie...

Mitigation Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	Summary	Published
CVE-2026-42444	ℹ️ low	3.3	NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a denial-of-service vulnerability exists i...	2026-05-12
CVE-2026-42445	ℹ️ low	3.3	NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an uncontrolled recursion vulnerability ex...	2026-05-12
CVE-2026-44215	🔶 medium	4.4	NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write e...	2026-05-12
CVE-2026-42355	ℹ️ low	3.3	NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an uncontrolled recursion vulnerability ex...	2026-05-12
CVE-2026-42442	ℹ️ low	3.3	NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the U...	2026-05-12
CVE-2026-42443	ℹ️ low	3.3	NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an integer divide-by-zero exists in the UF...	2026-05-12

These CVEs affect the same products