PT-2026-40360 · Nanazip · Nanazip

Jarlob · CVE-2026-42446 · Published 2026-05-12 · Updated 2026-05-12

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions NanaZip versions 5.0.1252.0 through 6.0.1697.0

Description A stack-based out-of-bounds read exists in the ZealFS filesystem image parser. This occurs when opening a specially crafted ZealFS v1 filesystem image, where an attacker-controlled BitmapSize field in the file header triggers an unbounded loop that reads past the end of a stack-allocated ZEALFS V1 HEADER structure.

Recommendations Update to version 6.0.1698.0.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-42446

GHSA-4C79-HFR4-MQV9

Affected Products

Nanazip

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42446.json · Exploit
• https://github.com/M2Team/NanaZip/security/advisories/GHSA-4c79-hfr4-mqv9 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-42446 · Security Note
• https://osv.dev/vulnerability/CVE-2026-42446 · Vendor Advisory
• https://twitter.com/CVEnew/status/2054324092304789833 · Twitter Post
• https://twitter.com/infoflowcloud/status/2054324743923257647 · Twitter Post