TI-2026-18328 Aliases CVE-2026-22812 GHSA-vxw4-wv6m-9hhh

OpenCode's Unauthenticated HTTP Server Allows Arbitrary Command Execution

HIGH 73CWE-306Published 2026-01-12 · Updated 2026-01-13

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

OpenCode is an open source AI coding agent. Prior to 1.0.216, OpenCode automatically starts an unauthenticated HTTP server that allows any local process (or any website via permissive CORS) to execute arbitrary shell commands with the user's privileges. This vulnerability is fixed in 1.0.216.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.16538 97th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed opencode (anomalyco): 1.0.216opencode-ai (npm): 1.0.216

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
anomalyco	opencode	before 1.0.216	1.0.216	Patch available	CNA
—	opencode-ai (npm)	before 1.0.216	1.0.216	Patch available	GHSA-vxw4-wv6m-9hhh

opencode Vendoranomalyco Affected before 1.0.216 Fixed in 1.0.216 Patch available CNA
opencode-ai (npm) Vendor— Affected before 1.0.216 Fixed in 1.0.216 Patch available GHSA-vxw4-wv6m-9hhh

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:anoma:opencode::::::-::*	before 1.0.216	Vulnerable	Anoma

cpe:2.3:a:anoma:opencode:*:*:*:*:*:-:*:* Versions before 1.0.216 Vulnerable ·Anoma

Remediation

Fix · CNA opencode (anomalyco) Fixed in 1.0.216
Fix · GHSA-vxw4-wv6m-9hhh opencode-ai (npm) Fixed in 1.0.216 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-22812
2026-10-03 Alias added: GHSA-vxw4-wv6m-9hhh

References

Exploit 1

https://github.com/anomalyco/opencode/security/advisories/GHSA-vxw4-wv6m-9hhh

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-22812

Other 2

TI-2026-82374 OS command injection in open via PowerShell on Windows CVSS 4.0HIGH 7.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences