VulnerabilityDeferred

CVE-2026-45380

bit7z is a cross-platform C++ static library that allows the compression/extraction of archive files.

LOW 3.6EPSS 0.12%

Does this matter?

Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.

Description

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.

CVSS 3.1: 3.6 LOWCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
EPSS: 0.12% probability · 2th percentile
CISA KEV: Not listed
Weakness: CWE-22, CWE-193
Source: security-advisories@github.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.