CVE-2026-55195 — py7zr: Decompression bomb (zip bomb) denial of service via unchecked extraction size
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 …
Published: 2026-07-08 · CVSS: 8.7 · CVSS 4.0
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 expands to 100 MB to exhaust disk or memory before extraction completes. This issue is fixed in version 1.1.3.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7