vulnerability / NVI-00013069 / Revision 2
9router: Mass assignment in PATCH /api/settings allows authenticated authorization downgrade
GitHub lists this reviewed advisory for 9router. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
8.7 HIGH (4.0)
security-advisories@github.com severity; no combined Null risk score.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
9router
source listed<= 0.5.2
### 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
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
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05 / Provenance
Sources you can inspect
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- GHSA-vmjq-hvgq-2wv4 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
- CVE-2026-56679 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 2 ·
Source facts changed; compare the preserved prior revision.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.