Improperly Controlled Modification of Dynamically-Determined Object Attributes Affecting 9router package, versions <0.5.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published20 Jul 2026
- disclosed15 Jul 2026
- creditUnknown
Introduced: 15 Jul 2026
NewCVE-2026-56679 (opens in a new tab)How to fix?
Upgrade 9router to version 0.5.4 or higher.
Overview
9router is a 9Router CLI - Start and manage 9Router server
Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes via the PATCH /api/settings endpoint, which writes the entire request body to persistent settings without a field whitelist. An attacker can downgrade authorization and disable authentication for the entire application by sending crafted requests that set security-critical fields, thereby exposing protected routes to unauthenticated access.