CVE-2026-90447
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
A routing rule selects between two different authentication mechanisms for the same downstream service based on the value of a client-supplied request header, rather than on any property the client cannot control. An authenticated user in possession of a shared service credential can set this header to route around the primary role-based authorization check and reach the alternate path's fixed, elevated role instead. This allows a low-privileged authenticated attacker who knows the shared credential to perform actions reserved for a higher-privileged role.
| CWE | CWE-290 |
| Vendor | cisa |
| Product | malcolm |
| Published | Sep 11, 2026 |
| Last Updated | Sep 14, 2026 |
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Affected Versions
CISA / Malcolm
0 < v26.06.0