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CVE PROGRAM SOURCE RECORD9.4 Critical

CVE-2026-22813

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

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

anomalyco opencode

  • < 1.1.10affected

References