RUSTSEC-2026-0307

uncbv: archive extraction is vulnerable to path traversal (zip-slip)

Reported

September 23, 2026

Issued

September 24, 2026

Package

uncbv (crates.io)

Type

Vulnerability

Categories

code-execution

Keywords

#zip-slip #path-traversal #directory-traversal #arbitrary-file-write #cbv

References

https://github.com/antoyo/uncbv

CVSS Score

7.1 HIGH

CVSS Details

Attack Vector: Local
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality Impact: None
Integrity Impact: High
Availability Impact: High

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Patched

>=0.3.1

Description

Summary

uncbv extract writes each archive entry to output_dir.join(entry_filename) using the filename stored in the archive with no check for .. components or absolute paths. A malicious .cbv / .cbz archive whose entry name contains ../ (or an absolute path) can therefore cause files to be written outside the output directory chosen by the user. This is a "zip-slip" / directory-traversal arbitrary file write (CWE-22).

Advisory available under CC0-1.0 license.