CVE-2026-55655
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
15/100
Published: 2026-06-23
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Conf. Impact
CVSS Vector Breakdown
AV:
Local
AC:
High
PR:
Low
UI:
Required
S:
Unchanged
C:
High
I:
Low
A:
None
Description
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.
Weakness Classification (1)
Affected Software (6)
| Vendor | Product | Version |
|---|---|---|
| openbsd | openssh | - |
| redhat | enterprise_linux | 6.0 |
| redhat | enterprise_linux | 7.0 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
| redhat | enterprise_linux | 10.0 |
References & Advisories (49)
Vendor Advisory
Issue Tracking
Vendor Advisory
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