CVE-2023-39320: Golang Go

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

The go.mod toolchain directive, introduced in Go 1.21, can be leveraged to execute scripts and binaries relative to the root of the module when the "go" command was executed within the module. This applies to modules downloaded using the "go" command from the module proxy, as well as modules downloaded directly using VCS software.

Affected products

• Golang Go: from 1.21.0, before 1.21.1 (fixed in 1.21.1)

Published 2023-09-08. Last modified 2026-06-17.