{"action":"Upgrade toolchain to 1.25.10 or later.","affected":[{"fixed":"1.25.10","introduced":"0"},{"fixed":"1.26.3","introduced":"1.26.0-0"}],"component":"toolchain","cve_ids":["CVE-2026-42501"],"ecosystem":"Go","epss":0.00231,"exploited":false,"fixed_versions":["1.25.10","1.26.3"],"id":"tcs_01M5KGH6030HAQ54FWTCTZ8HDZ","modified_at":"2026-08-31T10:25:58.552579461Z","published_at":"2026-05-07T19:21:40Z","references":["https://osv.dev/vulnerability/GO-2026-4984","https://go.dev/cl/775321","https://go.dev/issue/79070","https://groups.google.com/g/golang-announce/c/qcCIEXso47M"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GO-2026-4984","url":"https://osv.dev/vulnerability/GO-2026-4984"},{"source":"nvd","source_id":"CVE-2026-42501","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42501"}],"summary":"Malicious module proxy can bypass checksum database in cmd/go"}