VULNERABILITY INTELLIGENCE

CVE-2026-22813

CVSS score6.1 MEDIUM
EPSS probability0.91%
CISA KEVNot currently listed
Published2026-01-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references