VulnSocial

CVE-2026-3087Disclosure(microsoft / python)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

microsoft CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-22

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • python
  • windows

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
microsoftpython
Products
pythonwindows

2 versions affected across 2 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-04-28: 1Technical Details · 2026-04-28: 104-28
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • Open Source Security mailing list@oss_security
    Disclosure

    CVE-2026-3087: CPython: shutil.unpack_archive() doesn't check for Windows absolute paths in ZIPs https://www.openwall.com/lists/oss-security/2026/04/28/9 ZIP archive with an absolute path containing a drive (`C:\\...`) may be extracted outside the target directory on Windows

    Post summary

    The post discloses a path traversal flaw in CPython’s shutil.unpack_archive, where ZIP archives containing Windows absolute paths can extract files outside the intended directory.

    0201031.0K
    4.7K followersView on X
CPE platform detail10 entries

10 of 10 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows---
Apppythonpython---
Apppythonpython3.15.0--
Apppythonpython3.15.0--
Apppythonpython3.15.0--
Apppythonpython3.15.0--
Apppythonpython3.15.0--
Apppythonpython3.15.0--
Apppythonpython3.15.0--
Apppythonpython3.15.0--

Explore more

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