CVE-2022-44900

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-12-06 · updated 2026-06-17
Weakness: CWE-22

Description

A directory traversal vulnerability in the SevenZipFile.extractall() function of the python library py7zr v0.20.0 and earlier allows attackers to write arbitrary files via extracting a crafted 7z file.

Affected products

Py7Zr Project Py7Zr: before 0.20.1 — fixed in 0.20.1

How to fix

Upgrade to a fixed version: Py7Zr Project Py7Zr 0.20.1. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/170127/py7zr-0.20.0-Directory-Traversal.html
https://github.com/miurahr/py7zr/commit/1bb43f17515c7f69673a1c88ab9cc72a7bbef406
https://lessonsec.com/cve/cve-2022-44900/
http://packetstormsecurity.com/files/170127/py7zr-0.20.0-Directory-Traversal.html
https://github.com/miurahr/py7zr/commit/1bb43f17515c7f69673a1c88ab9cc72a7bbef406
https://lessonsec.com/cve/cve-2022-44900/

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