Low 2.4Published Jul 10, 2026

CVE-2026-55782NanaZip: Unbounded memory allocation (DoS) in NanaZip WebAssembly parser via attacker-controlled section/name length fields

Updated under an hour ago (Oct 27, 2026, 10:23 PM ET)

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Every CVE for M2Team NanaZip

Exploited in the last 30 days

NanaZip is the 7-Zip derivative intended for the modern Windows experience. Prior to 6.5.1749.0, NanaZip's WebAssembly archive handler in NanaZip.Codecs.Archive.WebAssembly.cpp allocates buffers from attacker-controlled 32-bit section and custom-name length fields without validating them against the data present in the file. A tiny crafted module can force multi-gigabyte allocations during listing or extraction through NameSize, Information.Size, and std::string or vector allocation paths, causing memory exhaustion or process termination. This issue is fixed in version 6.5.1749.0.

CVSS: 2.4 LOW (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-400, CWE-789
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

M2Team NanaZip m2team:nanazip (from the name)	before 6.5.1749.0	CNA record

References

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-qxhc-2v6p-wm8m	x-refsource-confirm
https://github.com/M2Team/NanaZip/commit/1ce90f2d14a984476d0407a835273705607facf2	x-refsource-misc
https://github.com/M2Team/NanaZip/commit/56aee89037947410dd5e66f3a087e0f290484bae	x-refsource-misc
https://github.com/M2Team/NanaZip/commit/92b12a6e1eb0cf8e88fcc277aa7508ca1ff27db6	x-refsource-misc
https://github.com/M2Team/NanaZip/releases/tag/6.5.1749.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.