Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/miurahr/py7zr/commit/28faf107b64374fa5a02bfb93aa2024e281ca97b
- https://github.com/miurahr/py7zr/releases/tag/v1.1.3
- https://github.com/miurahr/py7zr/security/advisories/GHSA-gjrg-mpp7-g774
- https://github.com/miurahr/py7zr/security/advisories/GHSA-gjrg-mpp7-g774
FAQ
What is CVE-2026-55195?
CVE-2026-55195 is a documented vulnerability. 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...
How severe is CVE-2026-55195?
CVSS scoring is not yet available for CVE-2026-55195. Check NVD for updates.
Is there a patch for CVE-2026-55195?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.