What is CVE-2026-3731?

CVE-2026-3731 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-bounds

Which CVE IDs does CVE-2026-3731 cover?

CVE-2026-3731 covers the following CVE IDs: CVE-2026-3731. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-3731?

CVE-2026-3731 has a CVSS v3 base score of 5.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-3731?

CVE-2026-3731 affects 4 products, including: azl3 libssh 0.10.6-5 on Azure Linux 3.0; azl3 libssh 0.10.6-6 on Azure Linux 3.0; cbl2 libssh 0.10.6-5 on CBL Mariner 2.0; cbl2 libssh 0.10.6-5 on CBL-Mariner 2.0.

CVE-2026-3731MediumCVSS 5.3

libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-bounds

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-3731 →

🎯 Affected products4

azl3 libssh 0.10.6-5 on Azure Linux 3.0
azl3 libssh 0.10.6-6 on Azure Linux 3.0
cbl2 libssh 0.10.6-5 on CBL Mariner 2.0
cbl2 libssh 0.10.6-5 on CBL-Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 0.10.6-6 KBRelease Notes (Security Update) — fixed build 0.10.6-6

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3731
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade