CVE-2026-55655
MEDIUM
5.0
CVSS 3.1
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.
Metadata
Severity & Metrics
5.0
MEDIUM CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N
Affected products (7)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-923 | cna | Improper Restriction of Communication Channel to Intended Endpoints |
CVSS scores (1)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 5.0 | MEDIUM | 3.1 | cna | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N |
References (2)