CVE-2026-27140 — Improper Restriction of Names for Files and Other Resources in Toolchain CMD GO

CWE-641 — Improper Restriction of Names for Files and Other Resources12 documents8 sources
Severity
8.8HIGHNVD
EPSS
0.0%
top 94.66%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
GO Toolchain CMD GO
Timeline
PublishedApr 8
Latest updateApr 9

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages1 packages

▶CVEListV5go_toolchain/cmd_go1.26.0-0 — 1.26.2+1

🔴Vulnerability Details

4
OSV
CVE-2026-27140: 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↗2026-04-08
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GHSA
GHSA-5w89-2c2x-6x66: 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↗2026-04-08
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CVEList
Code execution vulnerability in SWIG code generation in cmd/go↗2026-04-08
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OSV
Code execution vulnerability in SWIG code generation in cmd/go↗2026-04-07
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📋Vendor Advisories

2
Red Hat
cmd/go: golang: Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names↗2026-04-08
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Debian
CVE-2026-27140: golang-1.15 - SWIG file names containing 'cgo' and well-crafted payloads could lead to code sm...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-27140 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

4
Bugzilla
CVE-2026-27140 golang: Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names [fedora-all]↗2026-04-09
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Bugzilla
CVE-2026-27140 gcc-epel: Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names [epel-all]↗2026-04-09
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Bugzilla
CVE-2026-27140 golang: Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names [fedora-43]↗2026-04-09
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Bugzilla
CVE-2026-27140 cmd/go: golang: Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names↗2026-04-08
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CVE-2026-27140 — GO Toolchain CMD GO vulnerability | cvebase