{"action":"Upgrade python-multipart to 0.0.30 or later.","affected":[{"fixed":"0.0.30","introduced":"0"}],"component":"python-multipart","cve_ids":["CVE-2026-53539"],"ecosystem":"PyPI","epss":0.0046,"exploited":false,"fixed_versions":["0.0.30"],"ghsa_id":"GHSA-5rvq-cxj2-64vf","id":"tcs_01M5KF1QADEA1AGQN6TC36R5AE","modified_at":"2026-09-10T03:50:48.426087467Z","published_at":"2026-06-15T20:24:09Z","references":["https://osv.dev/vulnerability/GHSA-5rvq-cxj2-64vf","https://github.com/Kludex/python-multipart/security/advisories/GHSA-5rvq-cxj2-64vf","https://github.com/Kludex/python-multipart"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-5rvq-cxj2-64vf","url":"https://osv.dev/vulnerability/GHSA-5rvq-cxj2-64vf"}],"summary":"python-multipart: Quadratic-time querystring parsing with semicolon separators causes CPU denial of service"}