CVE-2026-22813: OpenCode is an open source AI coding agent

Q: How do I fix CVE-2026-22813?

opencode: upgrade to 1.1.10. Exact commands for each OS are on this page.

Q: Is CVE-2026-22813 being exploited?

CVE-2026-22813 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-22813 affect?

CVE-2026-22813 affects opencode. Severity is medium (CVSS 6.1). 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

Q: How urgent is CVE-2026-22813?

Priority 41/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2026-22813 is a medium-severity flaw (CVSS 6.1) affecting opencode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-01-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: anoma

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-12 23:15 UTCPublished CVE record published
2026-06-17 10:20 UTCUpdated Record last modified

anoma opencode UPGRADE

Affected: < 1.1.10

Fixed in: 1.1.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy opencode || rpm -q opencode || opencode --version

2. UPGRADE to 1.1.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade opencode

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade opencode

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-22813?

opencode: upgrade to 1.1.10. Exact commands for each OS are on this page.

Is CVE-2026-22813 being exploited?

CVE-2026-22813 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-22813 affect?

CVE-2026-22813 affects opencode. Severity is medium (CVSS 6.1). 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

How urgent is CVE-2026-22813?

Priority 41/100. Public exploit reference

Related CVEs

CVE-2026-22812 HIGH 8.8 UPGRADE OpenCode is an open source AI coding agent

References

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