{"action":"Upgrade matrix-synapse to 1.20.0 or later.","affected":[{"fixed":"1.20.0","introduced":"0"}],"component":"matrix-synapse","cve_ids":["CVE-2020-26890"],"ecosystem":"PyPI","epss":0.03004,"exploited":false,"fixed_versions":["1.20.0"],"ghsa_id":"GHSA-4mp3-385r-v63f","id":"tcs_01M5KG9Z3WSRD4XWQZXFSXVC3D","modified_at":"2023-11-08T04:03:20.282079Z","published_at":"2020-11-24T03:15:00Z","references":["https://osv.dev/vulnerability/PYSEC-2020-237","https://github.com/matrix-org/synapse/security/advisories/GHSA-4mp3-385r-v63f","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U34DPP4ZLOEDUY2ZCWOHQPU5GA5LYNUQ/","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G7YXMMYQP46PYL664JQUXCA3LPBJU7DQ/"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2020-237","url":"https://osv.dev/vulnerability/PYSEC-2020-237"}],"summary":"Matrix Synapse before 1.20.0 erroneously permits non-standard NaN, Infinity, and -Infinity JSON values in fields of m.room.member events, allowing remote attackers to execute a denial of service attac"}