Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| CISA / Malcolm | affected 0 before v26.06.0; unaffected v26.06.0 |
CWE
CWE-290
References
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.json
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-254-01
ADP enrichment
No English description supplied.
No references supplied.