{"id":"CVE-2026-44329","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-44329","generatedAt":"2026-10-28T03:41:14.902Z","title":"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.","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.","published":"2026-05-27T17:16:38.000Z","lastModified":"2026-10-14T20:10:00.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":10,"severity":"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":["free5gc/free5gc"],"epss":{"score":0.00331,"percentile":0.26065,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.33%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/free5gc/free5gc/issues/887","tags":["Exploit","Issue Tracking"],"source":"security-advisories@github.com"},{"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3","tags":["Exploit","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/free5gc/smf/commit/e23ce97565f285eb99eed153743c62bf4c767c6e","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/free5gc/smf/pull/197","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/free5gc/free5gc/issues/887","tags":["Exploit","Issue Tracking"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3","tags":["Exploit","Vendor Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-44329","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}