CVE-2026-42459
Published: May 27, 2026
Modified: May 28, 2026
Description
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the free5GC UDM component fails to validate the supi path parameter in six GET handlers of the nudm-sdm (Subscriber Data Management) service. An unauthenticated attacker can inject control characters into the SUPI parameter, causing UDM to forward a malformed request to UDR and return a 500 Internal Server Error response that exposes internal infrastructure details. This vulnerability is fixed in 4.2.2.
| Vendor | Product | Versions |
|---|---|---|
free5gc | free5gc | affected < 4.2.2 |
References
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