Server panic via missing authority or Host headers in google.golang.org/grpc

{
  "id": "8ad21c9693ca410db21449d8fd60712118ae514ccd22f96e34feec247de9db74",
  "url": "https://osv.dev/vulnerability/GO-2026-6443",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Server panic via missing authority or Host headers in google.golang.org/grpc",
    "summary": "In google.golang.org/grpc, servers configured with xDS routing can panic when processing requests that lack both :authority and Host headers. The HTTP/2 transport layer accepted requests missing these headers, and the xDS server routing interceptor attempted to index the empty authority slice, causing an unhandled panic and terminating the server.",
    "evidence": "osv:GO-2026-6443",
    "products": [
      {
        "name": {
          "value": "google.golang.org/grpc",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.82.2",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "1.83.2",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "1.84.0-dev.0.20260825144003-d5a41119e0e3",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "1.85.0-dev.0.20260825072537-93e31b48545e",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "GO-2026-6443",
      "aliases": [
        "CVE-2026-84445",
        "GHSA-2v4p-qf9q-27wj",
        "GO-2026-6443"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.82.2"
                },
                {
                  "introduced": "1.83.0"
                },
                {
                  "fixed": "1.83.2"
                },
                {
                  "introduced": "1.84.0-dev"
                },
                {
                  "fixed": "1.84.0-dev.0.20260825144003-d5a41119e0e3"
                },
                {
                  "introduced": "1.85.0-dev"
                },
                {
                  "fixed": "1.85.0-dev.0.20260825072537-93e31b48545e"
                }
              ]
            }
          ],
          "package": {
            "name": "google.golang.org/grpc",
            "purl": "pkg:golang/google.golang.org/grpc",
            "ecosystem": "Go"
          },
          "database_specific": {
            "source": "https://vuln.go.dev/ID/GO-2026-6443.json"
          },
          "ecosystem_specific": {
            "imports": [
              {
                "path": "google.golang.org/grpc/internal/transport",
                "symbols": [
                  "http2Server.HandleStreams",
                  "http2Server.operateHeaders"
                ]
              },
              {
                "path": "google.golang.org/grpc/internal/xds/server",
                "symbols": [
                  "RouteAndProcess"
                ]
              }
            ]
          }
        }
      ],
      "modified": "2026-10-07T17:45:12.223368677Z",
      "provider": "osv",
      "references": [
        "https://github.com/grpc/grpc-go/security/advisories/GHSA-2v4p-qf9q-27wj",
        "https://github.com/grpc/grpc-go/issues/9354",
        "https://github.com/grpc/grpc-go/pull/9365"
      ],
      "provider_metadata": {
        "url": "https://pkg.go.dev/vuln/GO-2026-6443",
        "review_status": "REVIEWED"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-84445",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 97100,
  "published_at": "2026-09-15T18:39:25+00:00"
}