Uncaught Exception Affecting github.com/grpc/grpc-go/internal/xds/server package, versions <1.82.2>=1.83.0 <1.83.2
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- published9 Sept 2026
- disclosed8 Sept 2026
- creditmatiasinsaurralde
Introduced: 8 Sep 2026
NewCVE-2026-84445 Â (opens in a new tab)How to fix?
Upgrade github.com/grpc/grpc-go/internal/xds/server to version 1.82.2, 1.83.2 or higher.
Overview
Affected versions of this package are vulnerable to Uncaught Exception through the HTTP/2 header processing path in internal/transport/http2_server.go and internal/xds/server/routing.go. An attacker can crash the server by sending a gRPC request that omits both the :authority and Host headers. In xds.NewGRPCServer() deployments, that malformed request reaches the xDS routing interceptor, which expects an authority value and then indexes into an empty header slice. The resulting panic terminates the server process, causing a complete outage for clients connected to that gRPC server.