PT-2026-48534 · Rikyoz · Bit7Z

Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-45380

NVD

CVSS v3.1

3.6

Low

Base vector

AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L

bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files. Prior to version 4.0.12, a one-byte off-by-one error in SafeOutPathBuilder::restoreSymlink() allows an attacker to craft a .7z archive that, when extracted with bit7z on any non-Windows platform, creates a symlink escaping the intended output directory. Subsequent archive entries extracted through this symlink write arbitrary files outside the extraction directory with the permissions of the extracting process. This issue has been patched in version 4.0.12.

Fix

Path traversal

Weakness Enumeration

CWE-22

CWE-193

Related Identifiers

CVE-2026-45380

Affected Products

Bit7Z

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-45380 · Security Note
• https://github.com/rikyoz/bit7z/security/advisories/GHSA-8wj8-9jwv-j24v · Note
• https://github.com/rikyoz/bit7z/releases/tag/v4.0.12 · Note