{"action":"Upgrade github.com/modelcontextprotocol/go-sdk to 1.4.1 or later.","affected":[{"fixed":"1.4.1","introduced":"0"}],"component":"github.com/modelcontextprotocol/go-sdk","cve_ids":[],"ecosystem":"Go","exploited":false,"fixed_versions":["1.4.1"],"ghsa_id":"GHSA-q382-vc8q-7jhj","id":"tcs_01M5KGFZMDCC8YDPNE56MB6K0V","modified_at":"2026-03-25T15:29:13.034372Z","published_at":"2026-03-23T18:14:51Z","references":["https://osv.dev/vulnerability/GO-2026-4770","https://github.com/modelcontextprotocol/go-sdk/security/advisories/GHSA-q382-vc8q-7jhj","https://github.com/modelcontextprotocol/go-sdk/commit/724dd47aa3431b9d4cf9ac2eebbf7b38a629afca","https://github.com/segmentio/encoding/commit/7d5a25dbc5da13aed3cb047a127e4d0e96f536fb"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-4770","url":"https://osv.dev/vulnerability/GO-2026-4770"}],"summary":"Improper handling of null Unicode character when parsing JSON in github.com/modelcontextprotocol/go-sdk"}