VulnerabilityModified
CVE-2026-3087
Only Windows is affected by this vulnerability.
MEDIUM 6.0EPSS 0.55%
Does this matter?
Lower severity and a low EPSS score (0.55%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 6.0 MEDIUMCVSS: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/M
- EPSS
- 0.55% probability · 44th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- python/python
- Source
- cna@python.org
References
- https://github.com/python/cpython/commit/1071290169f85c09cf767c1099564a9426cdc7e8
- https://github.com/python/cpython/commit/65b255416ae217bf0e22085be3c1976cea18bd8cPatch
- https://github.com/python/cpython/commit/7ef7dd0a74f47facd1fadcbc77f8fb03beb5eb4d
- https://github.com/python/cpython/commit/8e13025747e1ca72e86d1f35637123f9c306f0cbPatch
- https://github.com/python/cpython/commit/8ee6aff14054b37b53e47194a2fa313e98163c94Patch
- https://github.com/python/cpython/commit/a6650a2cdf0c49fb8ce0c982903aa2aa274beefe
- https://github.com/python/cpython/commit/ab5ef98af693bded74a738570e81ea70abef2840Patch
- https://github.com/python/cpython/commit/b01e594fbe754a960212f908d047294e880b52fdPatch
- https://github.com/python/cpython/commit/ba0aca3bffce431fe2fbd53ca4cd6a717a2e2c19Patch
- https://github.com/python/cpython/commit/fc829e88753858c8ac669594bf0093f44948c0f4Patch
- https://github.com/python/cpython/issues/146581Exploit, Issue Tracking, Patch, Vendor Advisory
- https://github.com/python/cpython/pull/146591Issue Tracking, Patch
- https://mail.python.org/archives/list/security-announce@python.org/thread/X6FXE5C6KDKOVNX3EC3DWD5RUPFWOZA4/Mailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/28/9Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.