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CVE-2026-110925— Openssh: openssh: '$' and '\' in a command-line username expand through %u

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 OpenSSH 中发现了一个漏洞。通过 ssh 命令行输入的 usernames 仍可包含 或非常量结尾的反斜杠。当配置在 ProxyCommand 或 Match exec 中展开 %u 时，这些字符会被传递给 shell。

CVSS 5.4 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-110925

Vulnerability Information
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Vulnerability Title
Openssh: openssh: '$' and '\' in a command-line username expand through %u
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in OpenSSH. A username entered on the ssh command line can still contain '$' or a non-trailing backslash. When a configuration expands %u inside ProxyCommand or Match exec, those characters are passed into the shell.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Hardened Images - cpe:/a:redhat:hummingbird:1
Red Hat Red Hat Hardened Images - cpe:/a:redhat:hummingbird:1
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-110925

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III. Intelligence Information for CVE-2026-110925

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Vendor Advisories for CVE-2026-110925 (2)

Same Patch Batch · Red Hat · 2026-10-15 · 7 CVEs total

CVE-2026-85634 8.8 HIGH Wildfly-core: wildfly-core: deployer rbac role privilege escalation via path traversal in
CVE-2026-92982 8.5 HIGH Ansible-operator-plugins: ansible operator plugins: arbitrary code execution via jinja2 te
CVE-2026-110923 6.5 MEDIUM Openssh: openssh: sftp can write outside the destination directory from a server-supplied
CVE-2026-110926 5.3 MEDIUM Openssh: openssh: shared lz77 compression dictionary leaks plaintext across channels
CVE-2026-110924 4.8 MEDIUM Openssh: openssh: gssapi delegated credentials can be stored after a failed authentication
CVE-2026-110927 4.3 MEDIUM Openssh: openssh: a compressed payload can expand past the maximum packet size

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-78

V. Comments for CVE-2026-110925

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