{"action":"Upgrade pillow to 12.3.0 or later.","affected":[{"fixed":"12.3.0","introduced":"0"}],"component":"pillow","cve_ids":["CVE-2026-55798"],"ecosystem":"PyPI","epss":0.00179,"exploited":false,"fixed_versions":["12.3.0"],"ghsa_id":"GHSA-4x4j-2g7c-83w6","id":"tcs_01M5KGYCMMFFVAM2G0EFJB0GNT","modified_at":"2026-07-13T07:26:48.229039344Z","published_at":"2026-07-06T19:17:08.830Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2257","https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst","https://github.com/python-pillow/Pillow/commit/8404ea5fe5df40fc34aa1e51403dd6fce0778b8a","https://github.com/python-pillow/Pillow/commit/88194166691b7b603529b8b036ab3ab9cedd2de4","https://github.com/python-pillow/Pillow/commit/b0e06caa64c1405aa3da0bb1d2bd9a77ca22de7f","https://github.com/python-pillow/Pillow/security/advisories/GHSA-4x4j-2g7c-83w6"],"severity":{"label":"medium","score":4.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-2257","url":"https://osv.dev/vulnerability/PYSEC-2026-2257"}],"summary":"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"}