{"id":"GHSA-v3f4-w7r7-v3hm","revision":"b244478cf92b4624bae98c327f01bbc1","records":[{"revision":"b244478cf92b4624bae98c327f01bbc1","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-v3f4-w7r7-v3hm","aliases":["CVE-2026-58497"],"title":"Uni-CLI: Legacy HTTP MCP transport accepted browser-originated localhost requests","description":"## Impact\n\nUni-CLI versions before 0.225.2 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.\n\nThe 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.\n\n## Patches\n\nVersion 0.225.2 fixes the issue by moving the Origin policy into a shared guard and applying it before routing in both HTTP transports. Non-loopback browser Origins are rejected with HTTP 403 before health, OAuth, or /mcp dispatch runs. Non-browser clients that omit Origin remain supported.\n\n## Workarounds\n\nUpgrade to 0.225.2 or later. If upgrading is not immediately possible, do not expose the legacy HTTP MCP transport to browser-originated traffic; use the default stdio transport or the Streamable HTTP transport instead.\n\n## Credits\n\nReported privately by Ryan Vonbrubeck ([@dodge1218](https://github.com/dodge1218)).","state":0,"publishedAt":"2026-06-19T21:43:09+00:00","modifiedAt":"2026-10-24T02:56:07.9018891+00:00","affected":[{"ecosystem":"npm","name":"@zenalexa/unicli","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.225.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/olo-dot-io/Uni-CLI/security/advisories/GHSA-v3f4-w7r7-v3hm","https://github.com/olo-dot-io/Uni-CLI"],"sourceUrl":"https://github.com/advisories/GHSA-v3f4-w7r7-v3hm","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-v3f4-w7r7-v3hm","identifiers":["GHSA-v3f4-w7r7-v3hm","CVE-2026-58497"]},"retained":false,"historicalAffected":[]}],"coverage":[]}