OpenSSH <10.3: Missing confirmation in proxymode multiplexing
CVE-2026-35388 Published on April 2, 2026
OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.
Vulnerability Analysis
CVE-2026-35388 is exploitable with local system access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Attack Vector:
LOCAL
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
LOW
Availability Impact:
NONE
Weakness Type
Unprotected Alternate Channel
The software protects a primary channel, but it does not use the same level of protection for an alternate channel.
Products Associated with CVE-2026-35388
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Affected Versions
OpenBSD OpenSSH:- Before 10.3 is affected.