CRITICAL 9.1 Microsoft
CVE-2026-39831
Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh
Microsoft Security Update 2026-May: Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh
Affected Products
- azl3 cert-manager 1.12.15-6 on Azure Linux 3.0
- azl3 cf-cli 8.7.11-5 on Azure Linux 3.0
- 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 gh 2.62.0-15 on Azure Linux 3.0
- azl3 kubernetes 1.30.10-23 on Azure Linux 3.0
- azl3 kubevirt 1.7.1-2 on Azure Linux 3.0
- azl3 libcontainers-common 20240213-3 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-39831
- https://nvd.nist.gov/vuln/detail/CVE-2026-39831
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-05-12 via Microsoft. Affected: azl3 cert-manager 1.12.15-6 on Azure Linux 3.0, azl3 cf-cli 8.7.11-5 on Azure Linux 3.0, azl3 docker-buildx 0.14.0-11 on Azure Linux 3.0 and 5 more.
Risk Timeline
CVE Disclosed2026-05-12 · 83 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-39831NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-39831Related 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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