RUSTSEC-2026-0307
`uncbv`: archive extraction is vulnerable to path traversal (zip-slip)
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).
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
What each source reports
OSV Score used
`uncbv`: archive extraction is vulnerable to path traversal (zip-slip)
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).
- Record
RUSTSEC-2026-0307- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H - Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
uncbvcrates.io | 0.0.0-0 up to 0.3.1 | 0.3.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
RUSTSEC-2026-0307 is a high vulnerability (CVSS 7.1) in uncbv, published September 23, 2026. No source lists public exploit code. Fixed in uncbv 0.3.1.