Description
GitHub MCP Server is GitHub-s official MCP Server. Prior to 1.1.0, the CompletionsHandler function in pkg/github/server.go accesses params.Ref without first checking whether it is nil, so a completion/complete request with a missing or empty ref field triggers a nil pointer dereference and a Go runtime panic; because the crash occurs before any authentication or token validation, any unauthenticated client able to send JSON-RPC messages can crash the server, resulting in a complete denial of service. This issue is fixed in version 1.1.0.
CVSS 7.5EPSS 0.41000000000000003%Risk 0.78
View source- Published
- 2026-07-28 16:18:14
- Affected versions
- <1.1.0
- Type
- Web application
- Last modified
- 2026-08-08 01:24:51
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H