CVE-2026-22813
Medium
Description
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductAnoma Opencode
PublishedJan 12, 2026
First seenJan 12, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- anoma opencode1.1.10 or later
- opencode-ai1.1.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| anoma opencode | v < 1.1.10 | 1.1.10 |
| opencode-ainpm | v < 1.1.10 | 1.1.10 |
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