CVE Catalog

CVE-2026-58497

HighCVSS 8.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.27%

19th percentile - higher than 19% of all known CVEs

Summary

In Uni-CLI prior to version 0.225.2, the legacy JSON-RPC-over-HTTP MCP transport was exposed on loopback without validating browser Origin headers. A malicious web page could send a CORS simple POST to the local /mcp endpoint and drive tools/call requests against the user's local Uni-CLI server.

Risk Assessment

A malicious website visited by the user could invoke tools on their local Uni-CLI server, potentially leading to unauthorized actions on the user's behalf. The issue concerns the browser-to-localhost boundary.

Recommendation

Upgrade Uni-CLI to version 0.225.2, which contains the fix. Until patched, avoid starting the local MCP HTTP transport.

Related vulnerabilities

Original NVD description (English source)

Uni-CLI gives people and agents one command interface for websites, browsers, desktop applications, local tools, and MCP. Prior to version 0.225.2, Uni-CLI exposed the legacy JSON-RPC-over-HTTP MCP transport on loopback without validating browser Origin headers before routing requests. A malicious web page could send a CORS simple POST request, such as text/plain, to the local /mcp endpoint and deliver a JSON-RPC body to the dispatcher. If the user had started the local MCP HTTP transport, that page could drive tools/call requests against the user's local Uni-CLI server. The Streamable HTTP transport already enforced this browser-to-localhost boundary. The legacy stateless HTTP path did not, so the two HTTP transports had drifted. This issue is about the browser-to-localhost boundary; it does not change Uni-CLI's local-code-execution trust model. This issue has been patched in version 0.225.2.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS