CVE-2026-94447
Public on 2026-10-08
Modified on 2026-10-10
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.
NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9
NOTE: https://github.com/golang/go/issues/81834
NOTE: Fixed by: https://github.com/golang/go/commit/68fa7699a27d745f90bf8630202e1a415d1b0769 (go1.27.2)
NOTE: Fixed by: https://github.com/golang/go/commit/7325b729f07c7ff255b9b5e3f427234ebd21ac47 (go1.26.9)
We now ensure that golang.org/toolchain always goes to the network for the canonical checksum.
NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9
NOTE: https://github.com/golang/go/issues/81834
NOTE: Fixed by: https://github.com/golang/go/commit/68fa7699a27d745f90bf8630202e1a415d1b0769 (go1.27.2)
NOTE: Fixed by: https://github.com/golang/go/commit/7325b729f07c7ff255b9b5e3f427234ebd21ac47 (go1.26.9)
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | golang | Pending Fix | ||
| Amazon Linux 2 - Golang1.11 Extra | golang | No Fix Planned | ||
| Amazon Linux 2 - Golang1.19 Extra | golang | No Fix Planned | ||
| Amazon Linux 2 - Golang1.9 Extra | golang | No Fix Planned | ||
| Amazon Linux 2023 | golang | Pending Fix | ||
| Amazon Linux 2027 Preview | golang | Pending Fix |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |