CVE-2026-35388 Details
Description
OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.
A vulnerability exists in OpenSSH versions prior to 10.3, where connection multiplexing confirmation is omitted for proxy-mode multiplexing sessions. This issue can lead to unintended behavior in how multiplexed connections are managed, potentially causing disruptions in session handling or resource allocation.
Users can upgrade to OpenSSH 10.3 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2 | [email protected] | Third Party Advisory |
| https://www.openssh.org/releasenotes.html#10.3p1 | [email protected] | Release Notes |
| https://www.openwall.com/lists/oss-security/2026/04/02/3 | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-420 | Unprotected Alternate Channel | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openbsd openssh | < 10.3 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 27, 2026 | Initial Analysis | [email protected] |
| Apr 2, 2026 | New CVE Received | [email protected] |