CVE-2026-44329
10.0 CRITICALfree5GC is an open-source implementation of the 5G core network
Published: 2026-05-27 · Last updated: 2026-05-28
Severity and scoring
- CVSS
- 10.0 CRITICAL
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
- CWE
- CWE-306, CWE-862
Affected products
| Vendor | Product |
|---|---|
| free5gc | free5gc |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-44329
- [Exploit reference]https://github.com/free5gc/free5gc/issues/887
- [Vendor advisory]https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3
- [Patch]https://github.com/free5gc/smf/commit/e23ce97565f285eb99eed153743c62bf4c767c6e
- [Patch]https://github.com/free5gc/smf/pull/197
- [Exploit reference]https://github.com/free5gc/free5gc/issues/887
- [Vendor advisory]https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3
Related CVEs
Same vendor
- CVE-2026-44330 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
- CVE-2026-44328 — free5GC is an open-source implementation of the 5G core network (8.2 HIGH)
- CVE-2026-44327 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
- CVE-2026-44326 — free5GC is an open-source implementation of the 5G core network (9.4 CRITICAL)
- CVE-2026-44325 — free5GC is an open-source implementation of the 5G core network (7.5 HIGH)
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