CVE-2023-39320
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.76%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.76% probability · 78th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- golang/go
- Source
- security@golang.org
EPSS 1.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://go.dev/cl/526158Patch
- https://go.dev/issue/62198Issue Tracking
- https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJRelease Notes
- https://pkg.go.dev/vuln/GO-2023-2042Vendor Advisory
- https://security.gentoo.org/glsa/202311-09
- https://security.netapp.com/advisory/ntap-20231020-0004/Third Party Advisory
- https://go.dev/cl/526158Patch
- https://go.dev/issue/62198Issue Tracking
- https://groups.google.com/g/golang-dev/c/2C5vbR-UNkI/m/L1hdrPhfBAAJRelease Notes
- https://pkg.go.dev/vuln/GO-2023-2042Vendor Advisory
- https://security.gentoo.org/glsa/202311-09
- https://security.netapp.com/advisory/ntap-20231020-0004/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.