CVE-2026-27140

HIGH8.8EPSS 0.01%

Code execution vulnerability in SWIG code generation in cmd/go

Published: 4/7/2026Modified: 5/13/2026

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.

Affected packages (7)

Bitnami/golangfrom 0, < 1.25.9, >= 1.26.0-0, < 1.26.2
Debian/golang-1.15from 0
Debian/golang-1.19from 0
Debian/golang-1.24from 0
Debian/golang-1.25from 0, < 1.25.9-1
Debian/golang-1.26from 0, < 1.26.2-1
Go/toolchainfrom 0, < 1.25.9, >= 1.26.0-0, < 1.26.2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References (6)

ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-27140
PATCHhttps://go.dev/cl/763768
REPORThttps://go.dev/issue/78335
WEBhttps://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
WEBhttps://nvd.nist.gov/vuln/detail/CVE-2026-27140
WEBhttps://pkg.go.dev/vuln/GO-2026-4871