CVE-2026-35388
Received
Received - Intake
Connection Multiplexing Confirmation Bypass in OpenSSH Before
Publication date: 2026-04-02
Last updated on: 2026-04-27
Assigner: MITRE
Description
Description
OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| openbsd | openssh | to 10.3 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-420 | The product protects a primary channel, but it does not use the same level of protection for an alternate channel. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in OpenSSH versions before 10.3 where the software omits connection multiplexing confirmation for proxy-mode multiplexing sessions.
How can this vulnerability impact me? :
The vulnerability has a low severity score (CVSS 2.5) and involves a lack of confirmation in connection multiplexing for proxy-mode sessions. This could potentially lead to limited impact such as unauthorized session multiplexing or minor integrity issues, but it does not affect confidentiality or availability.
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