CVE Catalog

CVE-2026-90447

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

11th percentile - higher than 11% of all known CVEs

Summary

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.

Risk Assessment

A low-privileged authenticated attacker who knows the shared credential can perform actions reserved for a higher-privileged role. This constitutes a bypass of role-based access control.

Recommendation

Do not base authentication mechanism selection on client-controlled headers — use properties the client cannot modify. Review and restrict access to shared service credentials.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS