Home/CVE/If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...`) then th
CVE

CVE-2026-3087

If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...`) then th

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.

HIGH · CVSS 7.5 EPSS 0.00078
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules15 YARA rules0
⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
▤

Affected Products & Versions

2
python<= 3.14.4
pythonall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · 146581github.com
◈

Sigma Hunt Rules

15
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighPython Reverse Shell Execution Via PTY And Socket Modules
producthighInline Python Execution - Spawn Shell Via OS System Library
producthighPython One-Liners with Base64 Decoding - Linux
producthighPython Function Execution Security Warning Disabled In Excel
producthighPython One-Liners with Base64 Decoding
producthighPython Spawning Pretty TTY on Windows
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cna@python.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD27 Apr 2026 · 09:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
msrcCVE-2026-3087
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/python/cpython/commit/ab5ef98af693bded74a738570e81ea70abef2840Patch
https://github.com/python/cpython/commit/b01e594fbe754a960212f908d047294e880b52fdPatch
https://github.com/python/cpython/commit/fc829e88753858c8ac669594bf0093f44948c0f4Patch
https://github.com/python/cpython/pull/146591Issue TrackingPatch
https://mail.python.org/archives/list/security-announce@python.org/thread/X6FXE5C6KDKOVNX3EC3DWD5RUPFWOZA4/Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/28/9Mailing ListThird Party Advisory
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