PT-2026-40358 · Nanazip · Nanazip

Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-42444

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/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 denial-of-service issue exists in the littlefs filesystem image parser. The Open() method reads the BlockCount value from the superblock without validating it against the actual file size or an upper-bound limit. An attacker can use a crafted 44-byte littlefs image with BlockCount set to 0xFFFFFFFF to trigger approximately 4 billion heap allocations, leading to memory exhaustion.

Recommendations Update to version 6.0.1698.0.

Exploit

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-42444

Affected Products

Nanazip

References · 3

• 🔥 https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-42444 · Security Note
• https://twitter.com/CVEnew/status/2054324085602361535 · Twitter Post