CVE-2026-22813

EUVD-2026-2091
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.1 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
Affected Products (NVD)
VendorProductVersion
anomaopencode
𝑥
< 1.1.10
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/anomalyco/opencode/security/advisories/GHSA-c83v-7274-4vgp
https://github.com/anomalyco/opencode/security/advisories/GHSA-c83v-7274-4vgp