{"action":"Upgrade stdlib to 1.25.10 or later.","affected":[{"fixed":"1.25.10","introduced":"0"},{"fixed":"1.26.3","introduced":"1.26.0-0"}],"component":"stdlib","cve_ids":["CVE-2026-42499"],"ecosystem":"Go","epss":0.00798,"exploited":false,"fixed_versions":["1.25.10","1.26.3"],"id":"tcs_01M5KGH4S3FG06K3JWEY2J5Z2F","modified_at":"2026-10-07T10:41:46.157915498Z","published_at":"2026-05-07T19:21:40Z","references":["https://osv.dev/vulnerability/GO-2026-4977","https://go.dev/issue/78987","https://go.dev/cl/771520","https://groups.google.com/g/golang-announce/c/qcCIEXso47M"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-4977","url":"https://osv.dev/vulnerability/GO-2026-4977"}],"summary":"Quadratic string concatenation in consumePhrase in net/mail"}