CVE-2026-107333: Cisa Malcolm

High severity, CVSS 8.1. EPSS: 1% chance of exploitation in the next 30 days.

Malcolm's nginx based reverse proxy contains a URL path normalization inconsistency between its Lua based role-based access control (RBAC) authorization layer and nginx's own request routing logic. An authenticated user can craft a specially formatted request path to bypass role-based restrictions and reach administrative or role gated endpoints they should not have access to. This affects all restricted paths protected by the RBAC authorization layer, including file upload, PHP server, htadmin, and authentication management interfaces.

Affected products

• Cisa Malcolm: up to and including 26.07.1

Published 2026-10-08. Last modified 2026-10-08.