Splunk Enterprise Patroni REST API - Missing Authentication RCE

id: CVE-2026-76268

info:
  name: Splunk Enterprise Patroni REST API - Missing Authentication RCE
  author: DhiyaneshDk
  severity: critical
  description: |
    Splunk Enterprise versions 10.2.0 through 10.2.6 and 10.4.0 through 10.4.2 expose the Patroni REST API (PostgreSQL sidecar) on SHC members without authentication. An unauthenticated attacker can PATCH /config to set a malicious archive_command and POST /restart to trigger it, achieving remote code execution with the privileges of the PostgreSQL process via the classic Patroni RCE chain.
  impact: |
    An unauthenticated attacker with network access to the Patroni port can achieve remote code execution on the Splunk Enterprise server through PostgreSQL archive_command injection.
  remediation: |
    Upgrade Splunk Enterprise to version 10.2.7 or 10.4.3 or later.
  reference:
    - https://advisory.splunk.com/advisories/SVD-2026-1001
    - https://pocbit.org/pocs/cve-2026-76268
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2026-76268
    epss-score: 0.01589
    epss-percentile: 0.75227
    cwe-id: CWE-306
  metadata:
    verified: true
    max-request: 2
    vendor: splunk
    product: splunk_enterprise
    shodan-query: html:"patroni"
    fofa-query: body="patroni"
  tags: cve,cve2026,splunk,patroni,postgresql,rce,unauth,misconfig

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

http:
  - raw:
      - |
        GET /patroni HTTP/1.1
        Host: {{Hostname}}
        Accept: application/json

    matchers:
      - type: dsl
        internal: true
        dsl:
          - 'contains_all(body, "\"patroni\"", "\"state\"", "\"role\"")'
          - 'status_code == 200'
        condition: and

  - raw:
      - |
        GET /config HTTP/1.1
        Host: {{Hostname}}
        Accept: application/json

    matchers:
      - type: dsl
        dsl:
          - 'contains(body, "\"postgresql\"")'
          - 'status_code == 200'
        condition: and
# digest: 4b0a004830460221008b1abdd890679017fdee0cf89fecbc4b3031453e845791dcc7a2a66c23ec2d61022100c3e91bb6ff5175abe521a43c2885d5d79299c75ac4dc60b10faaa9c5799ae7fc:922c64590222798bb761d5b6d8e72950