{"action":"Upgrade toolchain to 1.25.13 or later.","affected":[{"fixed":"1.25.13","introduced":"0"},{"fixed":"1.26.6","introduced":"1.26.0-0"},{"introduced":"1.27.0-0"}],"component":"toolchain","cve_ids":["CVE-2026-56865"],"ecosystem":"Go","epss":0.00129,"exploited":false,"fixed_versions":["1.25.13","1.26.6","1.27.0-rc.3"],"id":"tcs_01M5KGS8DHSCHNNM64858MH9YZ","modified_at":"2026-08-19T12:25:40.780492871Z","published_at":"2026-08-13T21:43:54Z","references":["https://osv.dev/vulnerability/GO-2026-6179","https://go.dev/issue/80744","https://groups.google.com/g/golang-announce/c/94pEornpRlI","https://go.dev/cl/814960","https://go.dev/cl/815020"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-6179","url":"https://osv.dev/vulnerability/GO-2026-6179"}],"summary":"Fix transparency log tile verification bypass in golang.org/x/mod/sumdb/tlog"}