CVE-2026-3087CWE-22path-traversal

CVE-2026-3087

High · published April 28, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
53.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00731 · 53.8th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-04-28T01:16Z
Affected products (9)
ProductVersionsFixed in
python/python≤ 3.14.4—
python/pythonall versions—
python/pythonall versions—
python/pythonall versions—
python/pythonall versions—
python/pythonall versions—
python/pythonall versions—
python/pythonall versions—
python/pythonall versions—
References (14)
https://github.com/python/cpython/commit/1071290169f85c09cf767c1099564a9426cdc7e8 · [email protected]https://github.com/python/cpython/commit/65b255416ae217bf0e22085be3c1976cea18bd8c · [email protected]https://github.com/python/cpython/commit/7ef7dd0a74f47facd1fadcbc77f8fb03beb5eb4d · [email protected]https://github.com/python/cpython/commit/8e13025747e1ca72e86d1f35637123f9c306f0cb · [email protected]https://github.com/python/cpython/commit/8ee6aff14054b37b53e47194a2fa313e98163c94 · [email protected]https://github.com/python/cpython/commit/a6650a2cdf0c49fb8ce0c982903aa2aa274beefe · [email protected]https://github.com/python/cpython/commit/ab5ef98af693bded74a738570e81ea70abef2840 · [email protected]https://github.com/python/cpython/commit/b01e594fbe754a960212f908d047294e880b52fd · [email protected]https://github.com/python/cpython/commit/ba0aca3bffce431fe2fbd53ca4cd6a717a2e2c19 · [email protected]https://github.com/python/cpython/commit/fc829e88753858c8ac669594bf0093f44948c0f4 · [email protected]https://github.com/python/cpython/issues/146581 · [email protected]https://github.com/python/cpython/pull/146591 · [email protected]https://mail.python.org/archives/list/[email protected]/thread/X6FXE5C6KDKOVNX3EC3DWD5RUPFWOZA4/ · [email protected]http://www.openwall.com/lists/oss-security/2026/04/28/9 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 27 APR 20:46Z
    shutil.unpack_archive() doesn't check for Windows absolute paths in ZIPs
    cvelistv5