CVE-2026-94447

critical

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. We now ensure that golang.org/toolchain always goes to the network for the canonical checksum.

References

https://pkg.go.dev/vuln/GO-2026-6602

https://groups.google.com/g/golang-announce/c/U2fTuyDJznI

https://go.dev/issue/81834

https://go.dev/cl/840785

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95418

Details

Source: Mitre, NVD

Published: 2026-10-08

Updated: 2026-10-09

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:C/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Severity: Critical

EPSS

EPSS: 0.00126