{"action":"Upgrade synapse to 1.24.0-r0 or later.","affected":[{"fixed":"1.24.0-r0","introduced":"0"}],"component":"synapse","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.22","exploited":false,"fixed_versions":["1.24.0-r0"],"id":"tcs_01M6GT9G1R0FAGKA8JVB66PCXV","modified_at":"2026-11-03T06:32:37.051248178Z","published_at":"2020-12-09T19:15:11.500Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2020-26257","https://security.alpinelinux.org/vuln/CVE-2020-26257"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2020-26257#Alpine:v3.22/synapse","url":"https://osv.dev/vulnerability/ALPINE-CVE-2020-26257"}],"summary":"Matrix is an ecosystem for open federated Instant Messaging and VoIP. Synapse is a reference \"homeserver\" implementation of Matrix. A malicious or poorly-implemented homeserver can inject malformed ev"}