LOW 2.5 Microsoft

CVE-2026-35388

OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.

Microsoft Security Update 2026-Apr: OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.

Affected Products

cbl2 openssh 8.9p1-9 on CBL Mariner 2.0
cbl2 openssh 8.9p1-9 on CBL-Mariner 2.0
azl3 openssh 9.8p1-5 on Azure Linux 3.0
cbl2 openssh 8.9p1-9

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35388
https://nvd.nist.gov/vuln/detail/CVE-2026-35388

Published: 2026-04-14 · Source: Microsoft · Feed updated: 2026-09-19

This low severity vulnerability with a CVSS score of 2.5 was published on 2026-04-14 via Microsoft. Affected: cbl2 openssh 8.9p1-9 on CBL Mariner 2.0, cbl2 openssh 8.9p1-9 on CBL-Mariner 2.0, azl3 openssh 9.8p1-5 on Azure Linux 3.0 and 1 more.

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