Description
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.
Severity (CVSS)
| Base score | 8.3 |
|---|---|
| Severity | High |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |
| Provided by | CNA |
Weaknesses
- CWE-74 — CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
- CWE-78 — CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected products
| Vendor | Product | Versions |
|---|---|---|
| coder | coder | >= 2.34.0, < 2.34.2; >= 2.33.0, < 2.33.8; >= 2.30.0, < 2.32.7; < 2.29.17 |
References
- https://github.com/coder/coder/security/advisories/GHSA-mcqq-fqgf-rxwm (x_refsource_CONFIRM)
- https://github.com/coder/coder/pull/26154 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.29.17 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.32.7 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.33.8 (x_refsource_MISC)
- https://github.com/coder/coder/releases/tag/v2.34.2 (x_refsource_MISC)
Generated from the official CVE List on 08 Jul 2026 07:00 UTC.