UBUNTU-CVE-2026-23949

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Source
https://ubuntu.com/security/CVE-2026-23949
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23949.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-23949
Upstream
Published
2026-01-20T01:15:00Z
Modified
2026-01-21T18:15:58.993251Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:25.10 / jaraco.context

Package

Name
jaraco.context
Purl
pkg:deb/ubuntu/jaraco.context@6.0.1-1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.0.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-jaraco.context",
            "binary_version": "6.0.1-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23949.json"