CVE-2026-27711CWE-125

NanaZip UFS Archive Parser Memory Corruption via Unvalidated Directory Record Length

Medium · published February 25, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
4.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00161 · 4.9th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-02-25T23:44Z
EPSS history
Timeline
  • 25 FEB 23:44Z
    NanaZip UFS Archive Parser Memory Corruption via Unvalidated Directory Record Length
    cvelistv5