gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProcess in internal/xds/server/routing.go assumes that an authority value exists and indexes the empty slice. A remote client that can complete transport connection establishment can trigger an index-out-of-bounds panic that is not recovered by the per-RPC goroutine and terminates the entire server process. In insecure or ordinary TLS deployments the request can be unauthenticated, while strict mTLS or ALTS deployments require valid transport credentials before the malformed RPC can reach the interceptor. This issue is fixed in versions 1.82.2 and 1.83.2.

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Source ID Title
Github GHSA Github GHSA GHSA-2v4p-qf9q-27wj gRPC-Go xDS servers: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers
Fixes

Solution

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Workaround

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History

Tue, 15 Sep 2026 06:15:00 +0000

Type Values Removed Values Added
First Time appeared Grpc
Grpc grpc-go
Vendors & Products Grpc
Grpc grpc-go

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description gRPC-Go is the Go language implementation of gRPC. Prior to 1.82.2 and 1.83.2, servers created with xds.NewGRPCServer() allow internal/transport/http2_server.go to accept an RPC containing neither the :authority header nor the Host header, while RouteAndProcess in internal/xds/server/routing.go assumes that an authority value exists and indexes the empty slice. A remote client that can complete transport connection establishment can trigger an index-out-of-bounds panic that is not recovered by the per-RPC goroutine and terminates the entire server process. In insecure or ordinary TLS deployments the request can be unauthenticated, while strict mTLS or ALTS deployments require valid transport credentials before the malformed RPC can reach the interceptor. This issue is fixed in versions 1.82.2 and 1.83.2.
Title gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers
Weaknesses CWE-129
CWE-248
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-14T16:36:14.966Z

Reserved: 2026-09-01T20:05:09.422Z

Link: CVE-2026-84445

cve-icon Vulnrichment

Updated: 2026-09-14T16:36:09.428Z

cve-icon NVD

Status : Received

Published: 2026-09-14T17:17:51.743

Modified: 2026-09-14T17:17:51.743

Link: CVE-2026-84445

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T06:00:21Z

Weaknesses