Code execution vulnerability in SWIG code generation in cmd/go

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-27140
StatePUBLISHED
AssignerGo
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-08 02:16:02 UTC
Updated2026-04-16 19:26:59 UTC
DescriptionSWIG 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

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

EPSS: 0.000200000 probability, percentile 0.053290000 (date 2026-04-15)

Problem Types: CWE-863 | CWE-501: Trust Boundary Violation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1ADPDECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Golang Go All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Go Toolchain Cmd/go affected 1.25.9 semver Not specified
CNA Go Toolchain Cmd/go affected 1.26.0-0 1.26.2 semver Not specified

References

ReferenceSourceLinkTags
go.dev/cl/763768 [email protected] go.dev Release Notes
pkg.go.dev/vuln/GO-2026-4871 [email protected] pkg.go.dev Vendor Advisory
groups.google.com/g/golang-announce/c/0uYbvbPZRWU [email protected] groups.google.com Release Notes, Mailing List
go.dev/issue/78335 [email protected] go.dev Issue Tracking
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Juho Forsén of Mattermost (en)

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