CVE-2026-27710

low-risk
Published 2026-02-26

NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0, a denial-of-service vulnerability exists in NanaZip’s `.NET Single File Application` parser. A crafted bundle can force an integer underflow in header-size calculation and trigger an unbounded memory allocation attempt during archive open. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.0/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Nanazip

Affected Vendors

M2Team

References (2)

Exploit https://github.com/M2Team/NanaZip/security/advisories/GHSA-89qw-8p49-32wf
Exploit https://github.com/M2Team/NanaZip/security/advisories/GHSA-89qw-8p49-32wf
22
/ 100
low-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal