CVE-2026-44326

Description

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the 3gpp-traffic-influence API without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can create, read, patch, and delete traffic-influence subscriptions either with no Authorization header at all, or with a forged bearer token (e.g. Authorization: Bearer not-a-real-token). This includes creating AnyUeInd=true subscriptions intended to affect group / any-UE traffic steering. The route group is also reachable even when the running config's ServiceList does not declare it, so operators who think they disabled the service via config are still exposed. This vulnerability is fixed in 4.2.2.

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Produits concernés

• free5gc
• Free5gc free5gc

Scores CVSS

Faiblesses (CWE)

• CWE-862

Références

• https://github.com/free5gc/free5gc/issues/859 ExploitIssue Tracking
• https://github.com/free5gc/free5gc/security/advisories/GHSA-3p28-73q7-45xp ExploitVendor Advisory
• https://github.com/free5gc/nef/pull/23 Issue TrackingPatch
• https://github.com/free5gc/free5gc/security/advisories/GHSA-3p28-73q7-45xp ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories