Bug 2498255 (CVE-2026-55195) - CVE-2026-55195 py7zr: py7zr: Denial of Service via decompression bomb in 7zip archive extraction
Summary: CVE-2026-55195 py7zr: py7zr: Denial of Service via decompression bomb in 7zip...
Keywords:
Status: NEW
Alias: CVE-2026-55195
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-08 21:02 UTC by OSIDB Bzimport
Modified: 2026-07-08 22:19 UTC (History)
4 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-08 21:02:16 UTC 
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.
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