10

CVE-2026-44329

Exploit

free5GC: SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without OAuth2/bearer-token authorization middleware. A network attacker who can reach SMF on the SBI can hit UPI endpoints with no Authorization header at all, and the requests reach the SMF business handlers. In the running Docker lab this was directly demonstrated for read (GET /upi/v1/upNodesLinks), write (POST /upi/v1/upNodesLinks with attacker-controlled UP-node and link payload), and delete (DELETE /upi/v1/upNodesLinks/{nodeID}) operations. This vulnerability is fixed in 4.2.2.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Free5gc ≫ Free5gc Version < 4.2.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.33% 0.247
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 10 3.9 6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
CWE-306 Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

CWE-862 Missing Authorization

The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3
Vendor Advisory
Exploit
https://github.com/free5gc/free5gc/issues/887
Exploit
Issue Tracking
https://github.com/free5gc/smf/pull/197
Patch
Issue Tracking
https://github.com/free5gc/smf/commit/e23ce97565f285eb99eed153743c62bf4c767c6e
Patch