CVE-2026-27140

HIGH

Go cmd/go < 1.25.9 and < 1.26.2 - SWIG Build-Time Code Execution

Title source: manual

Description

SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.

References (4)

Core 4

Core References

https://go.dev/cl/763768

https://go.dev/issue/78335

https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU

https://pkg.go.dev/vuln/GO-2026-4871

Scores

CVSS v3 8.8

EPSS 0.0053

EPSS Percentile 40.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-863

Status published

Products (3)

Go toolchain/cmd/go < 1.25.9

Go toolchain/cmd/go 1.26.0-0 - 1.26.2

golang/go < 1.25.9

Published Apr 08, 2026

Tracked Since Apr 08, 2026