https://seclists.org/oss-sec/2026/q2/1006: [oss-security][CVE-2026-11940] Cpython: tarfile extraction filter bypass allows escaping the destination dictory
Published Jun 23, 2026
·Updated
Affected Software
1 affected component
Python CPython
Frequently Asked Questions
1
What is the severity of CVE-2026-11940?
CVE-2026-11940 has been classified as HIGH severity.
2
How do I fix CVE-2026-11940?
To fix CVE-2026-11940, upgrade to the latest version of CPython that addresses this vulnerability.
3
What does CVE-2026-11940 exploit?
CVE-2026-11940 exploits a tarfile extraction filter bypass that allows escaping the destination directory.
4
What impact does CVE-2026-11940 have?
CVE-2026-11940 may allow an attacker to overwrite files outside the intended directory during tarfile extraction.
5
In which versions of Python is CVE-2026-11940 present?
CVE-2026-11940 is present in affected versions of Python CPython prior to the patch release.