py7zr: py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryp...
CVE-2026-55206 is fixed in 2 products on 1 platform, first by OPENSUSE-SU-2026:21159-1, released June 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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 O(n^2) cumulative sum pattern for attacker-controlled numstreams values parsed from archive headers, allowing a crafted .7z archive to cause excessive CPU consumption during SevenZipFile.init() before extraction. This issue is fixed in version 1.1.3.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| py7zr · Debian 14 | 1.1.3+dfsg-1 | DEBIAN-CVE-2026-55206 | Jul 10, 2026 |
| python-py7zr · opensuse-leap 16.0 | 1.0.0-bp160.2.1 | OPENSUSE-SU-2026:21159-1 | Jun 25, 2026 |
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