CVE-2026-22812: OpenCode's Unauthenticated HTTP Server Allows Arbitrary Command Execution

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 16.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-12 · updated 2026-06-17
Weakness: CWE-306

Description

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.

Affected products

anomalyco opencode: before 1.0.216 — fixed in 1.0.216

How to fix

Upgrade to a fixed version: anomalyco opencode 1.0.216. Check the vendor advisory for mitigations.

References

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

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