Answer in brief
CVE-2026-84445 records a High severity (CVSS 8.7) vulnerability in gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers. The current sources do not mark it as known exploited. The current feed maps grpc/grpc-go (generic), google.golang.org/grpc (go), google.golang.org/grpc (go), google.golang.org/grpc (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps grpc/grpc-go (generic), google.golang.org/grpc (go), google.golang.org/grpc (go), google.golang.org/grpc (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| grpc/grpc-gogeneric | <1.82.2 || >=1.83.0 <1.83.2 | 1.82.2, 1.83.2 |
| google.golang.org/grpcgo | >=0 <1.82.2 >=1.83.0 <1.83.2 >=1.84.0-dev <1.84.0-dev.0.20260825144003-d5a41119e0e3 >=1.85.0-dev <1.85.0-dev.0.20260825072537-93e31b48545e | 1.82.2, 1.83.2, 1.84.0-dev.0.20260825144003-d5a41119e0e3, 1.85.0-dev.0.20260825072537-93e31b48545e |
| google.golang.org/grpcgo | >=1.84.0-dev <1.85.0-dev.0.20260825072537-93e31b48545e | 1.85.0-dev.0.20260825072537-93e31b48545e |
| google.golang.org/grpcgo | <1.82.2 | 1.82.2 |
| google.golang.org/grpcgo | >=1.83.0,<1.83.2 | 1.83.2 |
| google.golang.org/grpcgo | >=1.84.0-dev,<1.85.0-dev.0.20260825072537-93e31b48545e | 1.85.0-dev.0.20260825072537-93e31b48545e |
| google.golang.org/grpcgo | >=0 <1.82.2 | 1.82.2 |
| google.golang.org/grpcgo | >=1.83.0 <1.83.2 | 1.83.2 |
| google.golang.org/grpcgo | >=0 <1.82.2 >=1.83.0 <1.83.2 >=1.84.0-dev <1.85.0-dev.0.20260825072537-93e31b48545e | 1.82.2, 1.83.2, 1.85.0-dev.0.20260825072537-93e31b48545e |
| google.golang.org/grpcgo | >=1.84.0-dev,<1.84.0-dev.0.20260825144003-d5a41119e0e3 | 1.84.0-dev.0.20260825144003-d5a41119e0e3 |
| google.golang.org/grpcgo | >=1.85.0-dev,<1.85.0-dev.0.20260825072537-93e31b48545e | 1.85.0-dev.0.20260825072537-93e31b48545e |
| google.golang.org/grpcgo | >=1.84.0-dev <1.84.0-dev.0.20260825144003-d5a41119e0e3 | 1.84.0-dev.0.20260825144003-d5a41119e0e3 |
| google.golang.org/grpcgo | >=1.85.0-dev <1.85.0-dev.0.20260825072537-93e31b48545e | 1.85.0-dev.0.20260825072537-93e31b48545e |
Published upstream
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 8, 2026
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.
Quoted source text, attributed separately from HOL analysis.