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Dgraph: Zero Unauthenticated HTTP Admin removeNode Denial of Service

Type: advisorySources: OSV

Dgraph is an open source distributed GraphQL database. Prior to 25.4.0, Dgraph Zero registers administrative HTTP routes on port 6080 without authentication when the administrative interface is enabled. The /removeNode route accepts attacker-controlled id and group values and passes them to Server.RemoveNode, where group 0 can trigger ProposePeerRemoval. A remote unauthenticated attacker who can reach the Zero HTTP port can read topology through /state, allocate identifiers through /assign, access the exposed /moveTablet administrative route, or remove membership through /removeNode, disrupting the Zero control plane and destabilizing Alpha nodes that depend on Zero. The route registration occurs in dgraph/cmd/zero/run.go, and the demonstrated membership-removal path reaches Server.RemoveNode and ProposePeerRemoval. This issue is fixed in version 25.4.0.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-102748
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 03:15 UTC · Revision 1

Source evidence

Dgraph: Zero Unauthenticated HTTP Admin removeNode Denial of Service

core-osv · Original source

Published 14 Oct 2026, 18:34 UTC

Dgraph is an open source distributed GraphQL database. Prior to 25.4.0, Dgraph Zero registers administrative HTTP routes on port 6080 without authentication when the administrative interface is enabled. The /removeNode route accepts attacker-controlled id and group values and passes them to Server.RemoveNode, where group 0 can trigger ProposePeerRemoval. A remote unauthenticated attacker who can reach the Zero HTTP port can read topology through /state, allocate identifiers through /assign, access the exposed /moveTablet administrative route, or remove membership through /removeNode, disrupting the Zero control plane and destabilizing Alpha nodes that depend on Zero. The route registration occurs in dgraph/cmd/zero/run.go, and the demonstrated membership-removal path reaches Server.RemoveNode and ProposePeerRemoval. This issue is fixed in version 25.4.0.

osv:CVE-2026-102748
Complete source record
{
  "id": "e8cfea6f788a142de42efc6897a3c36998452aef51efc5e3ee99c7a393dbbb70",
  "url": "https://osv.dev/vulnerability/CVE-2026-102748",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Dgraph: Zero Unauthenticated HTTP Admin removeNode Denial of Service",
    "summary": "Dgraph is an open source distributed GraphQL database. Prior to 25.4.0, Dgraph Zero registers administrative HTTP routes on port 6080 without authentication when the administrative interface is enabled. The /removeNode route accepts attacker-controlled id and group values and passes them to Server.RemoveNode, where group 0 can trigger ProposePeerRemoval. A remote unauthenticated attacker who can reach the Zero HTTP port can read topology through /state, allocate identifiers through /assign, access the exposed /moveTablet administrative route, or remove membership through /removeNode, disrupting the Zero control plane and destabilizing Alpha nodes that depend on Zero. The route registration occurs in dgraph/cmd/zero/run.go, and the demonstrated membership-removal path reaches Server.RemoveNode and ProposePeerRemoval. This issue is fixed in version 25.4.0.",
    "evidence": "osv:CVE-2026-102748",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-102748",
      "aliases": [
        "CVE-2026-102748",
        "GHSA-qj98-gp63-54xj"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dgraph-io/dgraph",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a796c8420b5fda671e0a0f8cb76f474945e31c50"
                },
                {
                  "fixed": "c32f6041387fa631dbc057e265b71aec3384ead1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "25.4.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c32f6041387fa631dbc057e265b71aec3384ead1"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a796c8420b5fda671e0a0f8cb76f474945e31c50"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v25.4.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v25.3.8",
            "v25.3.7",
            "v25.3.6",
            "v25.3.5",
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            "v23.1.0-rc2",
            "v23.0.1",
            "v22.0.2",
            "v23.0.0",
            "v23.0.0-rc1",
            "v23.0.0-beta1",
            "v22.0.0",
            "v22.0.0-RC1-20221003",
            "v21.03.2",
            "v21.03.1",
            "v21.03.0",
            "v20.11.0-rc1",
            "release/v20.11-rc1",
            "v1.0.8",
            "v1.0.9",
            "v2.0.0-rc1",
            "v2.0.0-beta1",
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            "v1.0.10-rc1",
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            "v1.0.9-rc3",
            "v1.0.9-rc2",
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            "v1.0.8-rc2",
            "v1.0.8-rc1",
            "v1.0.7a",
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            "v1.0.7-rc3",
            "v1.0.7-rc2",
            "nightly",
            "v1.0.5",
            "v1.0.4",
            "v1.0.3",
            "v1.0.2",
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            "v0.9.4",
            "v0.9.0",
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            "v0.8.1",
            "v0.8.0",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102748.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.940686273Z",
      "provider": "osv",
      "references": [
        "https://github.com/dgraph-io/dgraph/releases/tag/v25.4.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102748.json",
        "https://github.com/dgraph-io/dgraph/security/advisories/GHSA-qj98-gp63-54xj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-102748",
        "https://github.com/dgraph-io/dgraph/commit/c32f6041387fa631dbc057e265b71aec3384ead1"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-306",
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102748.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-102748",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499973,
  "published_at": "2026-10-14T18:34:15.971+00:00"
}