CRITICAL 9.8 Microsoft

CVE-2026-27140

Code execution vulnerability in SWIG code generation in cmd/go

Microsoft Security Update 2026-Apr: Code execution vulnerability in SWIG code generation in cmd/go

Affected Products

azl3 golang 1.26.2-1 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
azl3 golang 1.25.8-1 on Azure Linux 3.0
azl3 golang 1.26.1-1 on Azure Linux 3.0
cbl2 msft-golang 1.25.8-1 on CBL Mariner 2.0
cbl2 python-tensorboard 2.11.0-3 on CBL Mariner 2.0
azl3 python-tensorboard 2.16.2-6 on Azure Linux 3.0

References

Published: 2026-04-14 · Source: Microsoft · Feed updated: 2026-08-04

This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-04-14 via Microsoft. Affected: azl3 golang 1.26.2-1 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 and 5 more.

Risk Timeline

CVE Disclosed2026-04-14 · 111 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27140

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2026-27140

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2026-40175	Axios has Unrestricted Cloud Metadata Exfiltration via Header Injection Chain	CRITICAL	10.0
CVE-2026-42960	Possible cache poisoning via promiscuous records for the authority section	CRITICAL	10.0
CVE-2026-46595	Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x	CRITICAL	10.0
CVE-2026-39821	Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/ne	CRITICAL	10.0
CVE-2024-24576 PoC	Rusts's `std::process::Command` did not properly escape arguments of batch files	CRITICAL	10.0
CVE-2026-7374	Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via sy	CRITICAL	9.9

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