CVE-2026-42446

Description

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.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-12 | Updated 2026-05-13 | Assigner GitHub_M

Problem types

CWE-125: Out-of-bounds Read

Product status

References

github.com/...anaZip/security/advisories/GHSA-4c79-hfr4-mqv9

cve.org (CVE-2026-42446)

nvd.nist.gov (CVE-2026-42446)

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