https://seclists.org/oss-sec/2026/q2/244: [oss-security][CVE-2026-3087] shutil.unpack_archive() doesn't check for Windows absolute paths in ZIPs
Published Apr 28, 2026
·Updated
Affected Software
1 affected component
Python Software Foundation CPython
Frequently Asked Questions
1
What is the severity of CVE-2026-3087?
CVE-2026-3087 has been classified as a MEDIUM severity vulnerability.
2
What is CVE-2026-3087 about?
CVE-2026-3087 pertains to the issue where shutil.unpack_archive() does not check for Windows absolute paths in ZIP files.
3
How do I fix CVE-2026-3087?
To fix CVE-2026-3087, it is recommended to update CPython to a version that includes the necessary security patches.
4
Which versions of CPython are affected by CVE-2026-3087?
CVE-2026-3087 affects affected versions of CPython prior to the patched release that addresses this vulnerability.
5
Are there any workarounds for CVE-2026-3087?
One workaround for CVE-2026-3087 is to manually check and validate the paths in ZIP files before unpacking.