Vulnerability · Published Jan 20, 2026 · Assigned by GitHub_M
CVE-2026-23949jaraco.context Has a Path Traversal Vulnerability
High 8.6
In plain English
A high-severity path traversal in jaraco.context from jaraco. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | jaraco.context | 6.0.1-1+deb13u1 | DEBIAN-CVE-2026-23949 |
| Debian:14 | jaraco.context | 6.0.1-2 | DEBIAN-CVE-2026-23949 |
| Debian:13 | setuptools | no fix listed | DEBIAN-CVE-2026-23949 |
| Debian:14 | setuptools | 84.0.0-2 | DEBIAN-CVE-2026-23949 |
| PyPI | jaraco-context | 6.1.0 | GHSA-58pv-8j8x-9vj2 |
| PyPI | jaraco-context | 6.1.0 | PYSEC-2026-1469 |
| Ubuntu:25.10 | jaraco.context | 6.0.1-1ubuntu0.1 | UBUNTU-CVE-2026-23949 |
| Ubuntu:25.10 | jaraco.context | 6.0.1-1ubuntu0.1 | USN-7979-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| jaraco | jaraco.context | >= 5.2.0, < 6.1.0 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
References
- https://github.com/jaraco/jaraco.context/security/advisories/GHSA-58pv-8j8x-9vj2 x_refsource_CONFIRM
- https://github.com/jaraco/jaraco.context/commit/7b26a42b525735e4085d2e994e13802ea339d5f9 x_refsource_MISC
- https://github.com/jaraco/jaraco.context/blob/main/jaraco/context/__init__.py#L74-L91 x_refsource_MISC
- https://github.com/pypa/setuptools/blob/main/setuptools/_vendor/jaraco/context.py#L55-L76 x_refsource_MISC