CVE-2026-55427

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-114577 A vulnerability was found in oretnom23 php-travel-agency-system. CWE-74
• CVE-2026-114575 A flaw has been found in TOTOLINK A950RG 4.1.2cu.5268_B20221104. CWE-74
• CVE-2026-112150 A security flaw has been discovered in vraj404 Criminal-Management-System up to… CWE-74
• CVE-2026-112141 A vulnerability was determined in satya-vinay Events-Management-System up to… CWE-74
• CVE-2026-112100 A vulnerability was determined in DeepPavlov up to 1.7.0. CWE-74
• CVE-2026-112087 A weakness has been identified in itsourcecode Online Cake Ordering System 1.0. CWE-74
• CVE-2026-111991 A security vulnerability has been detected in WongKinYiu yolov9 0.1. CWE-74
• CVE-2026-111986 A vulnerability was determined in AUTOMATIC1111 stable-diffusion-webui up to 1.10.1. CWE-74