{"id":"GO-2026-6602","revision":"3f4bc0c2e4c44ac7b484504df2ca826a","records":[{"revision":"3f4bc0c2e4c44ac7b484504df2ca826a","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6602","aliases":["BIT-golang-2026-94447","CVE-2026-94447"],"title":"Checksum database bypass for golang.org/toolchain in cmd/go","description":"Previously, a user operating inside of a malicious Go project that defines a bogus golang.org/toolchain go.sum entry and operates a malicious GOMODPROXY the user chooses to use can bypass the intended checksum.\n\nWe now ensure that golang.org/toolchain always goes to the network for the canonical checksum.","state":0,"publishedAt":"2026-10-08T22:31:09+00:00","modifiedAt":"2026-10-16T09:55:44.518919+00:00","affected":[{"ecosystem":"Go","name":"toolchain","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.26.9"},{"kind":"introduced","version":"1.27.0-0"},{"kind":"fixed","version":"1.27.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://go.dev/cl/840785","https://go.dev/issue/81834","https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-6602","license":"OSV · upstream source license applies","key":"osv:GO-2026-6602","identifiers":["GO-2026-6602","BIT-golang-2026-94447","CVE-2026-94447"]},"retained":false,"historicalAffected":[]}],"coverage":[]}