Vulnerability-Lookup

CVE-2026-56679 (GCVE-0-2026-56679)

Vulnerability from cvelistv5 – Published: 2026-07-15 20:50 – Updated: 2026-07-16 13:00

Title

9Router: Mass assignment in PATCH /api/settings allows authenticated authorization downgrade

Summary

9Router is an AI router & token saver. Prior to 0.5.4, the PATCH /api/settings endpoint writes the entire request body to persistent settings without a field whitelist, allowing an authenticated user to set security-critical fields such as requireLogin and disable authentication for the whole application, exposing protected routes such as /api/keys and /api/providers to unauthenticated access. This issue is reported as fixed in version 0.5.4.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-16 13:00 UTC

CWE

CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/decolua/9router/security/advis…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
decolua	9router	Affected: < 0.5.4	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-56679

Vulnerability from fkie_nvd - Published: 2026-07-15 21:16 - Updated: 2026-07-16 14:16

Severity

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/decolua/9router/security/advisories/GHSA-vmjq-hvgq-2wv4
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/decolua/9router/security/advisories/GHSA-vmjq-hvgq-2wv4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-VMJQ-HVGQ-2WV4

Vulnerability from github – Published: 2026-09-23 18:12 – Updated: 2026-09-23 18:12

Summary

9router: Mass assignment in PATCH /api/settings allows authenticated authorization downgrade

Details

Summary

The PATCH /api/settings endpoint writes the entire request body to persistent settings without a field whitelist. An authenticated user can set security-critical fields that are not meant to be modifiable here — notably requireLogin. Setting requireLogin: false disables authentication for the whole application, exposing all protected routes (e.g. /api/keys, /api/providers) to unauthenticated access.

Details

Root cause is unfiltered mass assignment (CWE-915):

src/app/api/settings/route.js (PATCH handler) parses the body and passes it to updateSettings(body), with special handling only for newPassword and oidcClientSecret. All other fields pass through.
src/lib/db/repos/settingsRepo.js — updateSettings does next = { ...current, ...updates }, so any key in the body overwrites stored settings, including requireLogin, tunnelDashboardAccess, authMode.
src/dashboardGuard.js — isAuthenticated returns true whenever settings.requireLogin === false, bypassing auth on all protected routes.

This is distinct from CVE-2026-5842 (CWE-285, pre-auth bypass on /api, patched in 0.3.75). This finding requires a valid authenticated session and abuses input handling, not missing authentication.

PoC

Instance on localhost:20128, default password 123456.

Authenticate, capture session: POST /api/auth/login body {"password":"123456"} → 200 {"success":true}
Mass-assign with the authenticated session: PATCH /api/settings body {"requireLogin":false} → 200, response confirms "requireLogin":false
Verify bypass with NO session/credentials: GET /api/keys → 200, returns full API key list unauthenticated
Cleanup (authenticated): PATCH /api/settings body {"requireLogin":true} → GET /api/keys returns 401 again

Impact

Post-authentication mass assignment. Any authenticated user (including one using the default password) can disable authentication globally, then read all stored API keys and provider connection data without credentials, and toggle tunnel/dashboard exposure. Escalates to remote full compromise when chained with the default password 123456 on an instance exposed via tunnel (tunnelDashboardAccess defaults to true).

Suggested fix

Whitelist user-configurable fields in the PATCH handler; move security-critical fields (requireLogin, tunnelDashboardAccess, authMode) to a dedicated endpoint requiring re-authentication (current-password re-entry), mirroring the existing DB export/import re-auth flow.

Severity

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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      },
      "package": {
        "ecosystem": "npm",
        "name": "9router"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
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    "CVE-2026-56679"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-915"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-23T18:12:33Z",
    "nvd_published_at": "2026-07-15T21:16:55Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nThe `PATCH /api/settings` endpoint writes the entire request body to persistent settings without a field whitelist. An authenticated user can set security-critical fields that are not meant to be modifiable here \u2014 notably `requireLogin`. Setting `requireLogin: false` disables authentication for the whole application, exposing all protected routes (e.g. `/api/keys`, `/api/providers`) to unauthenticated access.\n\n### Details\nRoot cause is unfiltered mass assignment (CWE-915):\n\n- `src/app/api/settings/route.js` (PATCH handler) parses the body and passes it to `updateSettings(body)`, with special handling only for `newPassword` and `oidcClientSecret`. All other fields pass through.\n- `src/lib/db/repos/settingsRepo.js` \u2014 `updateSettings` does `next = { ...current, ...updates }`, so any key in the body overwrites stored settings, including `requireLogin`, `tunnelDashboardAccess`, `authMode`.\n- `src/dashboardGuard.js` \u2014 `isAuthenticated` returns `true` whenever `settings.requireLogin === false`, bypassing auth on all protected routes.\n\nThis is distinct from CVE-2026-5842 (CWE-285, pre-auth bypass on `/api`, patched in 0.3.75). This finding requires a valid authenticated session and abuses input handling, not missing authentication.\n\n### PoC\nInstance on `localhost:20128`, default password `123456`.\n\n1. Authenticate, capture session:\n   `POST /api/auth/login` body `{\"password\":\"123456\"}` \u2192 `200 {\"success\":true}`\n2. Mass-assign with the authenticated session:\n   `PATCH /api/settings` body `{\"requireLogin\":false}` \u2192 `200`, response confirms `\"requireLogin\":false`\n3. Verify bypass with NO session/credentials:\n   `GET /api/keys` \u2192 `200`, returns full API key list unauthenticated\n4. Cleanup (authenticated): `PATCH /api/settings` body `{\"requireLogin\":true}` \u2192 `GET /api/keys` returns `401` again\n\n### Impact\nPost-authentication mass assignment. Any authenticated user (including one using the default password) can disable authentication globally, then read all stored API keys and provider connection data without credentials, and toggle tunnel/dashboard exposure. Escalates to remote full compromise when chained with the default password `123456` on an instance exposed via tunnel (`tunnelDashboardAccess` defaults to `true`).\n\n### Suggested fix\nWhitelist user-configurable fields in the PATCH handler; move security-critical fields (`requireLogin`, `tunnelDashboardAccess`, `authMode`) to a dedicated endpoint requiring re-authentication (current-password re-entry), mirroring the existing DB export/import re-auth flow.",
  "id": "GHSA-vmjq-hvgq-2wv4",
  "modified": "2026-09-23T18:12:33Z",
  "published": "2026-09-23T18:12:33Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/decolua/9router/security/advisories/GHSA-vmjq-hvgq-2wv4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56679"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/decolua/9router"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "9router: Mass assignment in PATCH /api/settings allows authenticated authorization downgrade"
}

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CVE-2026-56679 (GCVE-0-2026-56679)

FKIE_CVE-2026-56679

GHSA-VMJQ-HVGQ-2WV4

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