CVE-2026-42083High· 8.2▾ Twilightfree5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, PCF Npcf_SMPolicyControl missing authentication middleware allows unauthenticated access to SM policy handlers and disclosure of subscriber SUPI. In NewServ…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 45.1 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.5%
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, PCF Npcf_SMPolicyControl missing authentication middleware allows unauthenticated access to SM policy handlers and disclosure of subscriber SUPI. In NewServer(), the smPolicyGroup route group is created and routes are applied without attaching the router authorization middleware. In contrast, other PCF service groups such as Npcf_PolicyAuthorization do attach RouterAuthorizationCheck before route registration. Because the middleware is missing, requests to the /npcf-smpolicycontrol/v1/sm-policies, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/update, and /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/delete endpoints can reach business logic even when no valid OAuth token is provided. This vulnerability is fixed in 4.2.2.
free5gc < 4.2.2Upgrade past the affected range:
free5gc 4.2.2Connected by shared product, vendor, weakness, or advisory.
CVE-2026-44328High· 8.2free5GC is an open-source implementation of the 5G core network
CVE-2026-44329Critical· 10.0free5GC is an open-source implementation of the 5G core network
CVE-2026-44326Critical· 9.4free5GC is an open-source implementation of the 5G core network
CVE-2026-44320High· 7.3free5GC is an open-source implementation of the 5G core network
CVE-2026-44321High· 7.5free5GC is an open-source implementation of the 5G core network
CVE-2026-44315Critical· 9.4free5GC is an open-source implementation of the 5G core network