{"cve":"CVE-2026-44326","nvd":{"published":"2026-05-27T17:16:38.053","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 NEF mounts the 3gpp-traffic-influence API without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can create, read, patch, and delete traffic-influence subscriptions either with no Authorization header at all, or with a forged bearer token (e.g. Authorization: Bearer not-a-real-token). This includes creating AnyUeInd=true subscriptions intended to affect group / any-UE traffic steering. The route group is also reachable even when the running config's ServiceList does not declare it, so operators who think they disabled the service via config are still exposed. 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:U/C:L/I:H/A:H","score":9.4},"cwes":["CWE-862"],"references":["https://github.com/free5gc/free5gc/issues/859","https://github.com/free5gc/free5gc/security/advisories/GHSA-3p28-73q7-45xp","https://github.com/free5gc/nef/pull/23","https://github.com/free5gc/free5gc/security/advisories/GHSA-3p28-73q7-45xp"],"products":["free5gc:free5gc"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-44326","score":0.00311,"percentile":0.23749,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-3p28-73q7-45xp","url":"https://osv.dev/vulnerability/GHSA-3p28-73q7-45xp","summary":"free5GC's NEF 3gpp-traffic-influence API is unauthenticated; missing or forged bearer tokens can create, read, patch, and delete subscriptions","modified":"2026-06-25T18:56:27.818220201Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/nef","purl":"pkg:golang/github.com/free5gc/nef","ranges":["<=1.2.3"],"fixed":[]}]},{"id":"GO-2026-5093","url":"https://osv.dev/vulnerability/GO-2026-5093","summary":"free5GC's NEF 3gpp-traffic-influence API is unauthenticated; missing or forged bearer tokens can create, read, patch, and delete subscriptions in github.com/free5gc/nef","modified":"2026-06-25T18:45:19.537341108Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/nef","purl":"pkg:golang/github.com/free5gc/nef","ranges":["all versions"],"fixed":[]}]}],"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."]}