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Unrated severityNVD Advisory· Published Feb 25, 2026· Updated Feb 26, 2026

NanaZip UFS Archive Parser Memory Corruption via Unvalidated Directory Record Length

CVE-2026-27711

Description

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 memory corruption vulnerability in NanaZip’s UFS parser allows a crafted .ufs/.ufs2/.img file to trigger out-of-bounds memory access during archive open/listing. The bug is reachable via normal user file-open flow and can cause process crash, hang, and potentially exploitable heap corruption. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.

AI Insight

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Affected products

2
  • M2team/Nanazipllm-fuzzy2 versions
    >=5.0.1252.0, <6.0.1638.0+ 1 more
    • (no CPE)range: >=5.0.1252.0, <6.0.1638.0
    • (no CPE)range: >= 5.0.1252.0, < 6.0.1638.0

Patches

Vulnerability mechanics

References

1

News mentions

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