What is CVE-2026-27140?

CVE-2026-27140 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Code execution vulnerability in SWIG code generation in cmd/go

Which CVE IDs does CVE-2026-27140 cover?

CVE-2026-27140 covers the following CVE IDs: CVE-2026-27140. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-27140?

CVE-2026-27140 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-27140?

CVE-2026-27140 affects 9 products, including: azl3 golang 1.25.8-1 on Azure Linux 3.0; azl3 golang 1.25.9-1 on Azure Linux 3.0; azl3 golang 1.26.1-1 on Azure Linux 3.0; azl3 golang 1.26.2-1 on Azure Linux 3.0; azl3 golang 1.27.0-1 on Azure Linux 3.0; and others — see the full list on the advisory page.

CVE-2026-27140CriticalCVSS 9.8

Code execution vulnerability in SWIG code generation in cmd/go

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-27140 →

🎯 Affected products9

azl3 golang 1.25.8-1 on Azure Linux 3.0
azl3 golang 1.25.9-1 on Azure Linux 3.0
azl3 golang 1.26.1-1 on Azure Linux 3.0
azl3 golang 1.26.2-1 on Azure Linux 3.0
azl3 golang 1.27.0-1 on Azure Linux 3.0
cbl2 golang 1.18.8-10 on CBL Mariner 2.0
cbl2 golang 1.22.7-5 on CBL Mariner 2.0
cbl2 msft-golang 1.25.8-1 on CBL Mariner 2.0
cbl2 msft-golang 1.25.8-1 on CBL-Mariner 2.0

✅ Remediation

Security Update KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27140
patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade