Vulnerability record · CVE-2026-22813 · published 12 January 2026

CVE-2026-22813: Anoma opencode cross-site scripting vulnerability

Anoma · Opencode

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.

9.4 CVSS 4.0 Critical EPSS 0.92% · top 41.3% CWE-79 · Cross-site scripting

9.4CVSS 4.0 base score

0.92%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Opencode Anoma

References

Link	Tags
https://github.com/anomalyco/opencode/security/advisories/GHSA-c83v-7274-4vgp	ExploitVendor Advisory
https://github.com/anomalyco/opencode/security/advisories/GHSA-c83v-7274-4vgp	ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-22813), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.