CVE-2026-42444

3.3 LOW

NanaZip is an open source file archive

Published: 2026-05-12 · Last updated: 2026-05-18

Severity and scoring

CVSS: 3.3 LOW
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE: CWE-770

Affected products

Vendor	Product
m2team	nanazip

Description

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a denial-of-service vulnerability exists in the littlefs filesystem image parser in NanaZip. The handler's Open method reads BlockCount directly from the attacker-controlled superblock without any validation against the actual file size or any upper-bound ceiling, then iterates BlockCount times, allocating a file-path entry per iteration. A crafted 44-byte littlefs image with BlockCount = 0xFFFFFFFF causes ~4 billion heap allocations, exhausting available memory. This vulnerability is fixed in 6.0.1698.0.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-42444
[Vendor advisory]https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq
[Vendor advisory]https://github.com/M2Team/NanaZip/security/advisories/GHSA-7hqh-mq57-wjmq

Related CVEs

Same vendor

CVE-2026-42443 — NanaZip is an open source file archive (3.3 LOW)
CVE-2026-42442 — NanaZip is an open source file archive (3.3 LOW)
CVE-2026-42355 — NanaZip is an open source file archive (3.3 LOW)

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