CVE-2026-23949

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 stripfirstcomponent 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.

Database specific

{
    "cwe_ids": [
        "CWE-22"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23949.json"
}

References

Affected packages

Git / github.com/jaraco/jaraco.context

Affected ranges

Type: GIT
Repo: https://github.com/jaraco/jaraco.context
Events: Introduced

c23c888c869bfb693246f69ba512aaede5b0438b

Fixed

675aaf5bfb926bdafcded1b0e08ca011d6e0f599

Affected versions

v5.*

v5.2.0

v5.3.0

v6.*

v6.0.0

v6.0.1

v6.0.2

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23949.json"