CVE-2026-3087

Summary

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 Software

Weaknesses

• CWE-22: CWE-22

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/04/28/9

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/python/cpython/pull/146591
• https://github.com/python/cpython/issues/146581
• https://mail.python.org/archives/list/security-announce@python.org/thread/X6FXE5C6KDKOVNX3EC3DWD5RUPFWOZA4/
• https://github.com/python/cpython/commit/ab5ef98af693bded74a738570e81ea70abef2840
• https://github.com/python/cpython/commit/b01e594fbe754a960212f908d047294e880b52fd
• https://github.com/python/cpython/commit/fc829e88753858c8ac669594bf0093f44948c0f4
• https://github.com/python/cpython/commit/65b255416ae217bf0e22085be3c1976cea18bd8c
• https://github.com/python/cpython/commit/8e13025747e1ca72e86d1f35637123f9c306f0cb
• https://github.com/python/cpython/commit/8ee6aff14054b37b53e47194a2fa313e98163c94
• https://github.com/python/cpython/commit/ba0aca3bffce431fe2fbd53ca4cd6a717a2e2c19

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