CVE-2026-55798

mediumCVSS 4.5covered by 1 sourcefirst seen 2026-07-06

Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe shell command by directly embedding a file path into an f-string without escaping and passed the result to subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary cmd.exe commands. This issue is fixed in version 12.3.0.

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Exploitation outlook

Low exploitation risk0.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-55798: Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a…nvd · 2026-07-06

External references

NVD record for CVE-2026-55798

CVE.org record

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