CVE-2026-44329free5GC is an open-source implementation of the 5G core network.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 10.0 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
- Weakness (CWE)
- CWE-306, CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
free5gc free5gc free5gc:free5gc | before 4.2.2 | NVD |
References
- https://github.com/free5gc/free5gc/issues/887exploit, issue-tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3exploit, vendor-advisory
- https://github.com/free5gc/smf/commit/e23ce97565f285eb99eed153743c62bf4c767c6epatch
- https://github.com/free5gc/smf/pull/197issue-tracking, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.