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CVE-2026-19672— tarfile extraction filter bypass allows creation of directories outside the destination

CVSS 6.3 · Medium EPSS 0.32% · P25

Possible ATT&CK Techniques 1AI

T1135 · Network Share Discovery

Affected Version Matrix 1

VendorProductVersion RangeStatus
Python Software FoundationCPython< 3.16.0affected
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I. Basic Information for CVE-2026-19672

Vulnerability Information
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Vulnerability Title
tarfile extraction filter bypass allows creation of directories outside the destination
Source: CVE Program / CVE List V5
Vulnerability Description
The tarfile module's tar and data extraction filters created directories outside the destination for members whose name leaves the destination and returns to it, such as ../evil/../dest/sub/file. The containment check used the resolved path, but intermediate directories were created from the name as given. Only empty directories are created outside the destination. Member contents are still extracted inside it. To return to the destination the member's name must contain the destination directory's own final component, so extraction into a secure randomised directory is not affected. This affects POSIX platforms only. On Windows, .. components are collapsed before the path reaches the filesystem, so the directories outside the destination are never created.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
Python Software FoundationCPython 0 ~ 3.16.0 -

II. Public POCs for CVE-2026-19672

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III. Intelligence Information for CVE-2026-19672

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Patches & Fixes for CVE-2026-19672 (1)

Vendor Advisories for CVE-2026-19672 (1)

IV. Related Vulnerabilities

Same product: CPython
Same vendor: Python Software Foundation

V. Comments for CVE-2026-19672

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