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.
References
Configurations
Configuration 1 (hide)
|
History
30 Jul 2026, 09:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
30 Jul 2026, 06:25
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
08 Jul 2026, 14:17
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
25 Jun 2026, 17:00
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Redhat enterprise Linux
Openbsd openssh Redhat Openbsd |
|
| References | () https://access.redhat.com/security/cve/CVE-2026-55655 - Vendor Advisory | |
| References | () https://bugzilla.redhat.com/show_bug.cgi?id=2462250 - Issue Tracking, Vendor Advisory | |
| CPE | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* cpe:2.3:a:openbsd:openssh:-:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
23 Jun 2026, 04:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-23 04:17
Updated : 2026-07-30 09:16
NVD link : CVE-2026-55655
Mitre link : CVE-2026-55655
CVE.ORG link : CVE-2026-55655
JSON object : View
Products Affected
openbsd
- openssh
redhat
- enterprise_linux
CWE
CWE-923
Improper Restriction of Communication Channel to Intended Endpoints