rancher-incomplete-setup: Rancher - Incomplete Setup Exposure

2026-01-24 Rancher PoC Public

Description

Detected Rancher installation was found with an incomplete first-time setup. The bootstrap login page was publicly accessible at /dashboard/auth/login, indicating an unconfigured instance that could have been targeted for unauthorized setup completion.

PoC

id: rancher-incomplete-setup

info:
  name: Rancher - Incomplete Setup Exposure
  author: 0x_Akoko
  severity: low
  description: |
    Detected Rancher installation was found with an incomplete first-time setup. The bootstrap login page was publicly accessible at /dashboard/auth/login, indicating an unconfigured instance that could have been targeted for unauthorized setup completion.
  reference:
    - https://rancher.com/docs/rancher/v2.6/en/installation/
  metadata:
    verified: true
    max-request: 1
    shodan-query: title:"Rancher"
    fofa-query: title="Rancher"
  tags: rancher,misconfig,exposure,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/v3/settings/first-login"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"value":"true"'
          - '"name":"first-login"'
        condition: and

      - type: status
        status:
          - 200
# digest: 4a0a00473045022077c348f3cfd9c822cbae862cccb1dc635c9899e0af60d8500a435c8f35f31315022100e4fb6109a18815e3b1e9744d7aa0258a6a25794647637e31300464b5910d76e7:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/misconfiguration/installer/rancher-incomplete-setup.yaml

References

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