What is the CVSS score of CVE-2026-22813?

CVE-2026-22813 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of AI / ML are affected by CVE-2026-22813?

Organizations using OpenCode should be aware of moderate risk from CVE-2026-22813, a cross-site scripting vulnerability rated CVSS 6.1.. A patch is available.

Is there a public PoC exploit available for CVE-2026-22813?

Yes, a public proof-of-concept exploit is available for CVE-2026-22813. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-22813?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

AI / ML CVE-2026-22813

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-12 security-advisories@github.com

GHSA-c83v-7274-4vgp

XSS AI / ML Opencode

6.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 21, 2026 - 15:15 vuln.today

Public exploit code

CVE Published

Jan 12, 2026 - 23:15 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

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.

AnalysisAI

OpenCode's markdown renderer fails to sanitize HTML input in LLM responses, allowing attackers who control the chat output to inject arbitrary JavaScript that executes in the localhost:4096 origin without Content Security Policy protections. Public exploit code exists for this cross-site scripting vulnerability, affecting users of the AI coding agent through versions prior to 1.1.10. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.1 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	Fixed in version 1.1.10.. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-22813 vulnerability details – vuln.today

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