What is CVE-2026-59999?

CVE-2026-59999 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

Which CVE IDs does CVE-2026-59999 cover?

CVE-2026-59999 covers the following CVE IDs: CVE-2026-59999. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-59999?

CVE-2026-59999 has a CVSS v3 base score of 5.9, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-59999?

CVE-2026-59999 affects 1 product, including: azl3 openssh 9.8p1-8 on Azure Linux 3.0.

CVE-2026-59999MediumCVSS 5.9

In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

Vendor

Microsoft Security Response Center (MSRC)

Published

July 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-59999 →

🎯 Affected products1

azl3 openssh 9.8p1-8 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 9.8p1-9

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59999
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade