CVE-2026-26282

NanaZip has DotNet Single file OOB Heap Read

CVSS 5.2 MEDIUMEPSS 0.2%CWE-126

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.2EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

19 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, NanaZip has an out-of-bounds heap read in `.NET Single File` bundle header parser due to missing bounds check. Opening a crafted file with NanaZip causes a crash or leaks heap data to the user. Version 6.0.1630.0 patches the issue.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

M2Team · NanaZip

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References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-ccpc-2222-xv5c https://github.com/user-attachments/files/25274143/poc.exe.zip