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...

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...

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...