What is CVE-2026-55200?

CVE-2026-55200 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c

Which CVE IDs does CVE-2026-55200 cover?

CVE-2026-55200 covers the following CVE IDs: CVE-2026-55200. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-55200?

CVE-2026-55200 has a CVSS v3 base score of 8.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-55200?

CVE-2026-55200 affects 3 products, including: azl3 libssh 0.10.6-8 on Azure Linux 3.0; azl3 libssh2 1.11.1-2 on Azure Linux 3.0; azl3 libssh2 1.11.1-3 on Azure Linux 3.0.

CVE-2026-55200HighCVSS 8.1

libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-55200 →

🎯 Affected products3

azl3 libssh 0.10.6-8 on Azure Linux 3.0
azl3 libssh2 1.11.1-2 on Azure Linux 3.0
azl3 libssh2 1.11.1-3 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.11.1-3

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55200
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade