Missing Authorization Affecting 9router package, versions <0.5.2
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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- published11 Jul 2026
- disclosed10 Jul 2026
- creditUnknown
Introduced: 10 Jul 2026
NewCVE-2026-55638 (opens in a new tab)How to fix?
Upgrade 9router to version 0.5.2 or higher.
Overview
9router is a 9Router CLI - Start and manage 9Router server
Affected versions of this package are vulnerable to Missing Authorization via the rewrite process for the /codex path. An attacker can gain unauthorized access to backend LLM provider credentials and trigger upstream provider calls by sending crafted requests to /codex/* endpoints.