CVE-2026-35388

Name: CVE-2026-35388
Creator: NVD / NIST
Published: 2026-04-02T17:16:27.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.5/10EPSS 0.13%

Last modified Jun 17, 2026

CVE-2026-35388 is a low-severity vulnerability rated 2.5/10 on the CVSS scale. OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

2.5/10

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

0.13%

2.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-420

Affected Software

Vendor	Product	Versions
Openbsd	Openssh	< 10.3

References

https://marc.info/?l=openssh-unix-dev&m=177513443901484&w=2Third Party Advisory
https://www.openssh.org/releasenotes.html#10.3p1Release Notes
https://www.openwall.com/lists/oss-security/2026/04/02/3Third Party Advisory

Timeline

Published: Apr 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-35388?

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

How severe is CVE-2026-35388?

CVE-2026-35388 has a CVSS score of 2.5/10 (LOW severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.

How do I fix CVE-2026-35388?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-35388?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST