Path Traversal in Microsoft Windows
CVE-2026-3087
If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...`) then the archive will be extracted outside the target directory which is different than other operating systems. Only Windows…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.001 (29.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Microsoft Windows
- Python — versions 3.15.0
- Python Software Foundation Cpython — versions 0, 3.15.0a1
Weakness classification (CWE)
References
- cna@python.org (Patch, patch, Issue Tracking)
- cna@python.org (issue-tracking, Exploit, Patch, Issue Tracking, Vendor Advisory)
- cna@python.org (vendor-advisory, Mailing List, Vendor Advisory)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
- cna@python.org (Patch, patch)
Frequently asked questions
- What is CVE-2026-3087?
- CVE-2026-3087 is a high-severity vulnerability in Microsoft Windows, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-04-27.
- How severe is CVE-2026-3087?
- High severity. CVSS v3 base score is 7.5 out of 10.