CVE-2026-3087
EPSS 0.11%shutil.unpack_archive() doesn't check for Windows absolute paths in ZIPs
Published: 4/29/2026Modified: 5/20/2026
Description
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 is affected by this vulnerability.
Affected packages (3)
- Bitnami/libpythonfrom 0, < 3.14.5
- Bitnami/pythonfrom 0, < 3.14.5
- Bitnami/python-minfrom 0, < 3.14.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
References (8)
- WEBhttps://github.com/python/cpython/commit/ab5ef98af693bded74a738570e81ea70abef2840
- WEBhttps://github.com/python/cpython/commit/b01e594fbe754a960212f908d047294e880b52fd
- WEBhttps://github.com/python/cpython/commit/fc829e88753858c8ac669594bf0093f44948c0f4
- WEBhttps://github.com/python/cpython/issues/146581
- WEBhttps://github.com/python/cpython/pull/146591
- WEBhttps://mail.python.org/archives/list/[email protected]/thread/X6FXE5C6KDKOVNX3EC3DWD5RUPFWOZA4/
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2026-3087
- WEBhttp://www.openwall.com/lists/oss-security/2026/04/28/9