CRITICAL 9.1 Microsoft

CVE-2026-39833

Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent

Microsoft Security Update 2026-May: Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent

Affected Products

azl3 docker-buildx 0.14.0-11 on Azure Linux 3.0
azl3 docker-compose 2.27.0-9 on Azure Linux 3.0
azl3 packer 1.9.5-13 on Azure Linux 3.0
azl3 telegraf 1.31.0-19 on Azure Linux 3.0
azl3 docker-buildx 0.14.0-13 on Azure Linux 3.0
azl3 docker-compose 2.27.0-11 on Azure Linux 3.0
azl3 packer 1.9.5-15 on Azure Linux 3.0
azl3 telegraf 1.31.0-22 on Azure Linux 3.0

References

Published: 2026-05-12 · Source: Microsoft · Feed updated: 2026-09-19

This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-05-12 via Microsoft. Affected: azl3 docker-buildx 0.14.0-11 on Azure Linux 3.0, azl3 docker-compose 2.27.0-9 on Azure Linux 3.0, azl3 packer 1.9.5-13 on Azure Linux 3.0 and 5 more.

Risk Timeline

CVE Disclosed2026-05-12 · 129 days ago

Remediation Resources

Official Advisory

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-39833

NVD / MITRE

nvd.nist.gov/vuln/detail/CVE-2026-39833

Related Vulnerabilities

CVE	Title	Severity	CVSS
CVE-2025-62168 PoC	Squid vulnerable to information disclosure via authentication credential leakage	CRITICAL	10.0
CVE-2026-39821	Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/ne	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-2026-7374	Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via sy	CRITICAL	9.9
CVE-2026-85504	FreeIPMI before 1.6.19 has a stack-based buffer overflow in _ipmi_sel_oem_fujits	CRITICAL	9.8

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