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CVE-2026-22812

OpenCode's Unauthenticated HTTP Server Allows Arbitrary Command Execution

OpenCode is an open source AI coding agent. Prior to 1.0.216, OpenCode automatically starts an unauthenticated HTTP server that allows any local process (or any website via permissive CORS) to execute arbitrary shell commands with the user's privileges. This vulnerability is fixed in 1.0.216.

CVSS 3.1 · 8.8 High EPSS 16.5% KEV · Not listed
Vendors
Anoma Anomalyco
Products
Opencode Opencode
CVE-2026-22813

Malicious website can execute commands on the local system through XSS in the OpenCode web UI

OpenCode is an open source AI coding agent. The markdown renderer used for LLM responses will insert arbitrary HTML into the DOM. There is no sanitization with DOMPurify or even a CSP on the web interface to prevent JavaScript execution via HTML injection. This means controlling the LLM response for a chat session gets JavaScript execution on the http://localhost:4096 origin. This vulnerability is fixed in 1.1.10.

CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
Vendors
Anoma Anomalyco
Products
Opencode Opencode