Path Traversal in SharpZipLib
SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry ../evil.txt may be extracted in the parent directory of destFolder. This leads to arbitrary file write that may lead to code execution. The vulnerability was patched in version 1.3.3.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | SharpZipLib | < 1.3.3 | 1.3.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-32840
- https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc
- https://github.com/icsharpcode/SharpZipLib
- https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3
- https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L- Weakness (CWE)
CWE-22- Platform
- .NET (NuGet)
- Package
SharpZipLib- Disclosed
- 01.02.2022
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-m22m-h4rf-pwq3 - CC BY 4.0
Vulnerability history: SharpZipLib
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 02.2022 05.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 3
Disclosures per year
- 2022: 4
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Path Traversal in SharpZipLib this entry
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