Critical severity · published Sep 8, 2023
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…
9.8
CVSS
1.8%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
GO · Golang
1.21.0 before 1.21.1 · source: NVD
Affected product
GO
GO
Golang
More from GO
8.1
CVE-2020-0601
Microsoft Windows CryptoAPI Spoofing Vulnerability
7.5
CVE-2023-44487
HTTP/2 Rapid Reset Attack Vulnerability
10.0
CVE-2025-68121
Unexpected session resumption in crypto/tls
9.8
CVE-2026-27143
Missing bound checks can lead to memory corruption in safe Go in cmd/compile
9.8
CVE-2024-24790
The various Is methods (IsPrivate, IsLoopback, etc) did not work as expected for IPv4-mapped IPv6 addresses, returning false for addresses which would return true in their…