cvedb.io
CVE-2026-55655
MEDIUM · CVSS 5
EPSS exploitation probability: 0%
Published 2026-06-23T04:17:40.787 · Last modified 2026-06-25T18:16:40.583

Summary

A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack can compromise the confidentiality of forwarded X11 traffic, including sensitive window contents and input, and may allow some manipulation of the forwarded session.

Affected products

openbsd — openssh

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.