Path Traversal in Rikyoz Bit7z

CVE-2026-27117

bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files. Prior to version 4.0.11, a path traversal vulnerability ("Zip Slip") exists in bit7z's archive extraction functionality. The library does…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-27117?
CVE-2026-27117 is a medium-severity vulnerability in Rikyoz Bit7z, classified under Path Traversal. CVSS score: 5.5/10. Published 2026-02-24.
How severe is CVE-2026-27117?
Medium severity. CVSS v3 base score is 5.5 out of 10.