CVE-2026-55427— Coder vulnerable to SSH config injection via unsanitized server-supplied values in `coder config-ssh`

Coder vulnerable to SSH config injection via unsanitized server-supplied values in `coder config-ssh`

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `coder config-ssh` wrote server-supplied SSH settings (`HostnameSuffix`, `SSHConfigOptions`) into the user's `~/.ssh/config` without sanitizing embedded newlines or restricting directives so a malicious or compromised Coder server could inject arbitrary SSH configuration. Practical exploitation requires control of the server-supplied values through a malicious or compromised deployment, a man-in-the-middle position or admin access to the `HostnameSuffix` and `SSHConfigOptions` settings. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 validates `HostnameSuffix` and `SSHConfigOptions` against a strict character set that rejects newlines and other control characters. As a workaround, inspect `coder config-ssh --dry-run` output before applying changes.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

输出中的特殊元素转义处理不恰当(注入)

Coder 输入验证错误漏洞

Coder是Coder组织开源的一个可以在公共或私有云基础设施中设置开发环境的应用程序。 Coder存在安全漏洞，该漏洞源于对嵌入式换行符和指令清理不当，可能导致恶意或受损的Coder服务器注入任意SSH配置。以下版本受到影响：2.29.17之前版本、2.30.0至2.32.7之前版本、2.33.0至2.33.8之前版本和2.34.0至2.34.2之前版本。

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