{"cve":"CVE-2026-44329","nvd":{"published":"2026-05-27T17:16:38.490","modified":"2026-10-14T20:10:00.190","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H","score":10.0},"cwes":["CWE-306","CWE-862"],"references":["https://github.com/free5gc/free5gc/issues/887","https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3","https://github.com/free5gc/smf/commit/e23ce97565f285eb99eed153743c62bf4c767c6e","https://github.com/free5gc/smf/pull/197","https://github.com/free5gc/free5gc/issues/887"],"products":["free5gc:free5gc"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-44329","score":0.00331,"percentile":0.25981,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-3258-qmv8-frp3","url":"https://osv.dev/vulnerability/GHSA-3258-qmv8-frp3","summary":"free5GC's SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers","modified":"2026-06-08T20:15:14.322609775Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/smf","purl":"pkg:golang/github.com/free5gc/smf","ranges":["<1.4.3"],"fixed":["1.4.3"]}]},{"id":"GO-2026-4995","url":"https://osv.dev/vulnerability/GO-2026-4995","summary":"free5GC's SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers in github.com/free5gc/smf","modified":"2026-05-20T19:30:13.019111357Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/smf","purl":"pkg:golang/github.com/free5gc/smf","ranges":["<1.4.3"],"fixed":["1.4.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}