{"action":"Upgrade msgpack5 to 3.6.1 or later.","affected":[{"fixed":"3.6.1","introduced":"0"},{"fixed":"4.5.1","introduced":"4.0.0"},{"fixed":"5.2.1","introduced":"5.0.0"}],"component":"msgpack5","cve_ids":["CVE-2021-21368"],"ecosystem":"npm","epss":0.01649,"exploited":false,"fixed_versions":["3.6.1","4.5.1","5.2.1"],"ghsa_id":"GHSA-gmjw-49p4-pcfm","id":"tcs_01M5KFS2B95QZW6ERW6MX66XMN","modified_at":"2026-09-10T03:49:01.975317177Z","published_at":"2021-03-12T22:44:17Z","references":["https://osv.dev/vulnerability/GHSA-gmjw-49p4-pcfm","https://github.com/mcollina/msgpack5/security/advisories/GHSA-gmjw-49p4-pcfm","https://nvd.nist.gov/vuln/detail/CVE-2021-21368","https://github.com/mcollina/msgpack5/commit/d4e6cb956ae51c8bb2828e71c7c1107c340cf1e8","https://github.com/mcollina/msgpack5/releases/tag/v3.6.1","https://github.com/mcollina/msgpack5/releases/tag/v4.5.1","https://github.com/mcollina/msgpack5/releases/tag/v5.2.1","https://www.npmjs.com/package/msgpack5"],"severity":{"label":"medium","score":6.7},"sources":[{"source":"osv","source_id":"GHSA-gmjw-49p4-pcfm","url":"https://osv.dev/vulnerability/GHSA-gmjw-49p4-pcfm"}],"summary":"Prototype poisoning"}