{"action":"Upgrade synapse to 1.120.2-r0 or later.","affected":[{"fixed":"1.120.2-r0","introduced":"0"}],"component":"synapse","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.23","exploited":false,"fixed_versions":["1.120.2-r0"],"id":"tcs_01M6H0K8QGD5AWPA652B42VMAK","modified_at":"2026-11-03T06:32:50.189851941Z","published_at":"2024-12-03T17:15:12.633Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2024-53863","https://security.alpinelinux.org/vuln/CVE-2024-53863"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2024-53863#Alpine:v3.23/synapse","url":"https://osv.dev/vulnerability/ALPINE-CVE-2024-53863"}],"summary":"Synapse is an open-source Matrix homeserver. In Synapse versions before 1.120.1, enabling the dynamic_thumbnails option or processing a specially crafted request could trigger the decoding and thumbna"}