CVE-2026-55195

unknowncovered by 1 sourcefirst seen 2026-07-08

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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Exploitation outlook

Low exploitation risk0.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-55195: py7zr is a Python-based library and utility to support 7zip archive compression, decompression…nvd · 2026-07-08

External references

NVD record for CVE-2026-55195

CVE.org record

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