PT-2026-59605

Summary There exists an arbitrary file write vulnerability in py7zr 1.1.0, latest, which allows symbolic links to be recreated outside the destination directory via crafted malicious symbolic link chains. When using extractall to extract an archive, the library restores these symbolic links,...

CVE-2026-55195

py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Prior to 1.1.3, py7zr's Worker.decompress extracted archive entries without tracking total decompressed size, allowing a crafted .7z file such as a 15.6 KB archive that expan...

CVE-2026-55206

py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Prior to 1.1.3, PackInfo.read in archiveinfo.py used an On^2 cumulative sum pattern for attacker-controlled numstreams values parsed from archive headers, allowing a crafted...

Inefficient Algorithmic Complexity

Overview py7zr is a Pure python 7-zip library Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the PackInfo.read function. An attacker can cause excessive CPU consumption by providing a crafted archive with a large number of streams, leading to...

CVE-2022-44900

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...

USN-7030-1: py7zr vulnerability

It was discovered that py7zr was vulnerable to path traversal attacks. If a user or automated system were tricked into extracting a specially crafted 7z archive, an attacker could possibly use this issue to write arbitrary files outside the target directory on the host...

py7zr 路径遍历漏洞

py7zr is a library and utility program by the individual developer Hiroshi Miura. It supports compression, decompression, encryption and decryption of 7zip archives written in the Python programming language. A security vulnerability exists in py7zr version v0.20.0 and earlier versions. An attack...

PT-2022-27330 · Py7Zr +2 · Py7Zr +2

Name of the Vulnerable Software and Affected Versions: py7zr versions 0.20.0 and earlier Description: A directory traversal issue in the SevenZipFile.extractall function allows attackers to write arbitrary files by extracting a crafted 7z file. Recommendations: For py7zr versions 0.20.0 and...

CVE-2022-44900

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...