{"action":"Upgrade msgpack5 to 6.1.0 or later.","affected":[{"fixed":"6.1.0","introduced":"0"}],"component":"msgpack5","cve_ids":["CVE-2026-107299"],"ecosystem":"npm","epss":0.00389,"exploited":false,"fixed_versions":["6.1.0"],"ghsa_id":"GHSA-26wq-p25c-j6fv","id":"tcs_01M5KES6Q74HAE960FCJW410Z7","modified_at":"2026-10-08T18:00:08.901031374Z","published_at":"2026-10-08T17:40:01Z","references":["https://osv.dev/vulnerability/GHSA-26wq-p25c-j6fv","https://github.com/mcollina/msgpack5/security/advisories/GHSA-26wq-p25c-j6fv","https://github.com/mcollina/msgpack5/commit/85da345bf1acc18ca441741e5cf4aa0ed0d69314","https://github.com/mcollina/msgpack5","https://github.com/mcollina/msgpack5/releases/tag/v6.1.0"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"GHSA-26wq-p25c-j6fv","url":"https://osv.dev/vulnerability/GHSA-26wq-p25c-j6fv"}],"summary":"msgpack5: Reserved byte can cause unbounded stream buffering"}