CVE-2026-44317: FREE5GC

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's PCF POST /npcf-policyauthorization/v1/app-sessions handler panics on a single authenticated request whose ascReqData.suppFeat == "1" (enabling traffic-routing feature negotiation) and whose medComponents entries supply an afAppId but NO AfRoutReq. The create path then calls provisioningOfTrafficRoutingInfo(smPolicy, appID, routeReq, ...) with routeReq == nil and dereferences routeReq.RouteToLocs (and other fields) without a nil check, causing runtime error: invalid memory address or nil pointer dereference. Gin recovery converts the panic into HTTP 500. This vulnerability is fixed in 4.2.2.

Affected products

• FREE5GC FREE5GC: before 4.2.2 (fixed in 4.2.2)

Published 2026-05-27. Last modified 2026-06-17.