CVEvulnerability
CVE-2026-44329
10.0 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-27
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 10.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
- Weaknesses
- CWE-306, CWE-862
Description
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.
Affected configurations
• free5gc free5gc (< 4.2.2)
Related
References
- https://github.com/free5gc/free5gc/issues/887 Exploit, Issue Tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3 Exploit, Vendor Advisory
- https://github.com/free5gc/smf/commit/e23ce97565f285eb99eed153743c62bf4c767c6e Patch
- https://github.com/free5gc/smf/pull/197 Issue Tracking, Patch
- https://github.com/free5gc/free5gc/issues/887 Exploit, Issue Tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3 Exploit, Vendor Advisory