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CVE-2026-84445

CVE-2026-84445 · gRPC-Go: Denial of Service (DoS) via crash due to missing `:authority` and `Host` headers in the xDS servers

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.7 · High · EPSS 0.6%

Published
Updated

Stack: system

Affected products and versions

  • grpc-go

    Versions
    • < 1.82.2: Affected
    • >= 1.83.0, < 1.83.2: Affected

    No fix published

  • golang-google-grpc Debian:12

    Versions
    • 1.33.3-2
    • 1.38.0+really1.33.3-1
    • 1.38.0-1
    • 1.38.0-2
    • 1.38.0-3
    • 1.38.0-4
    • 1.38.0-5
    • 1.38.1-1
    • 1.59.0-1
    • 1.60.1-1
    • 1.60.1-2
    • 1.64.0-1
    • 1.64.0-2
    • 1.64.0-3
    • 1.64.0-4
    • 1.64.0-5
    • 1.64.0-6
    • 1.64.0-7
    • 1.66.3-1
    • 1.66.3-2
    • 1.75.1-1
    • 1.79.3-1
    • 1.79.3-1~bpo13+1
    • 1.81.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • golang-google-grpc Debian:13

    Versions
    • 1.64.0-7
    • 1.66.3-1
    • 1.66.3-2
    • 1.75.1-1
    • 1.79.3-1
    • 1.79.3-1~bpo13+1
    • 1.81.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • golang-google-grpc Debian:14

    Versions
    • 1.64.0-7
    • 1.66.3-1
    • 1.66.3-2
    • 1.75.1-1
    • 1.79.3-1
    • 1.79.3-1~bpo13+1
    • 1.81.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • golang-github-googlecloudplatform-grpc-gcp-go Ubuntu:26.10

    Versions
    • 1.5.3-1
    • 1.5.3-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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