CVE-2026-27140

HIGH 8.8

Code execution vulnerability in SWIG code generation in cmd/go

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

1th

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.

Vendor	go toolchain
Product	cmd/go
Published	Apr 8, 2026
Last Updated	Apr 13, 2026

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Affected Versions

Go toolchain / cmd/go

0 < 1.25.9 1.26.0-0 < 1.26.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/cl/763768 go.dev: https://go.dev/issue/78335 groups.google.com: https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-4871

Credits

Juho Forsén of Mattermost