{"action":"Upgrade github.com/modelcontextprotocol/go-sdk to 1.3.1 or later.","affected":[{"fixed":"1.3.1","introduced":"0"}],"component":"github.com/modelcontextprotocol/go-sdk","cve_ids":["CVE-2026-27896"],"ecosystem":"Go","epss":0.00292,"exploited":false,"fixed_versions":["1.3.1"],"ghsa_id":"GHSA-wvj2-96wp-fq3f","id":"tcs_01M5KFR772SRBMWN2RNC24B326","modified_at":"2026-09-10T03:50:36.139524509Z","published_at":"2026-02-26T22:20:08Z","references":["https://osv.dev/vulnerability/GHSA-wvj2-96wp-fq3f","https://github.com/modelcontextprotocol/go-sdk/security/advisories/GHSA-wvj2-96wp-fq3f","https://nvd.nist.gov/vuln/detail/CVE-2026-27896","https://github.com/modelcontextprotocol/go-sdk/commit/7b8d81c264074404abdf5aa16e2cf0c2d9c64cc0","https://github.com/modelcontextprotocol/go-sdk"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-wvj2-96wp-fq3f","url":"https://osv.dev/vulnerability/GHSA-wvj2-96wp-fq3f"},{"source":"nvd","source_id":"CVE-2026-27896","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27896"}],"summary":"MCP Go SDK Vulnerable to Improper Handling of Case Sensitivity"}