What is CVE-2026-22813?

CVE-2026-22813 is a medium-severity vulnerability in Anoma Opencode, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-12.

How severe is CVE-2026-22813?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Anoma Opencode

CVE-2026-22813

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 vi…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.009 (55.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Anoma Opencode
Anomalyco Opencode — versions < 1.1.10

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-22813?: CVE-2026-22813 is a medium-severity vulnerability in Anoma Opencode, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-12.
How severe is CVE-2026-22813?: Medium severity. CVSS v3 base score is 6.1 out of 10.