{"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_01M5KEZC7AQSTKG426Q0GTT963","modified_at":"2026-09-10T03:51:10.324377232Z","published_at":"2026-07-20T21:14:14Z","references":["https://osv.dev/vulnerability/GHSA-4x4j-2g7c-83w6","https://github.com/python-pillow/Pillow/security/advisories/GHSA-4x4j-2g7c-83w6","https://nvd.nist.gov/vuln/detail/CVE-2026-55798","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/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2026-2257.yaml","https://github.com/python-pillow/Pillow","https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst"],"severity":{"label":"medium","score":4.5},"sources":[{"source":"osv","source_id":"GHSA-4x4j-2g7c-83w6","url":"https://osv.dev/vulnerability/GHSA-4x4j-2g7c-83w6"}],"summary":"Pillow: WindowsViewer.get_command() OS command injection via unescaped shell path"}