Vulnerability Description
jaraco.context, an open-source software package that provides some useful decorators and context managers, has a Zip Slip path traversal vulnerability in the `jaraco.context.tarball()` function starting in version 5.2.0 and prior to version 6.1.0. The vulnerability may allow attackers to extract files outside the intended extraction directory when malicious tar archives are processed. The strip_first_component filter splits the path on the first `/` and extracts the second component, while allowing `../` sequences. Paths like `dummy_dir/../../etc/passwd` become `../../etc/passwd`. Note that this suffers from a nested tarball attack as well with multi-level tar files such as `dummy_dir/inner.tar.gz`, where the inner.tar.gz includes a traversal `dummy_dir/../../config/.env` that also gets translated to `../../config/.env`. Version 6.1.0 contains a patch for the issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jaraco | Jaraco.Context | >= 5.2.0, < 6.1.0 |
Related Weaknesses (CWE)
References
- https://github.com/jaraco/jaraco.context/blob/main/jaraco/context/__init__.py#L7Patch
- https://github.com/jaraco/jaraco.context/commit/7b26a42b525735e4085d2e994e13802ePatch
- https://github.com/jaraco/jaraco.context/security/advisories/GHSA-58pv-8j8x-9vj2ExploitMitigationVendor Advisory
- https://github.com/pypa/setuptools/blob/main/setuptools/_vendor/jaraco/context.pPatch
FAQ
What is CVE-2026-23949?
CVE-2026-23949 is a vulnerability with a CVSS score of 8.6 (HIGH). jaraco.context, an open-source software package that provides some useful decorators and context managers, has a Zip Slip path traversal vulnerability in the `jaraco.context.tarball()` function starti...
How severe is CVE-2026-23949?
CVE-2026-23949 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23949?
Check the references section above for vendor advisories and patch information. Affected products include: Jaraco Jaraco.Context.