{"cve":"CVE-2026-40247","nvd":{"published":"2026-04-16T22:16:38.510","modified":"2026-06-17T10:44:54.230","status":"Analyzed","description":"free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the handler for reading Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but does not return after sending the HTTP 404 response when validation fails. Execution continues and the subscription data is returned alongside the 404 response. An unauthenticated attacker with access to the 5G Service Based Interface can read arbitrary Traffic Influence Subscriptions, including SUPIs/IMSIs, DNNs, S-NSSAIs, and callback URIs, by supplying any value for the influenceId path segment. A patched version was not available at the time of publication.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-285","CWE-636"],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-x5r2-r74c-3w28"],"products":["free5gc:free5gc"],"source":"nvd","synced_at":"2026-10-19T22:30:49.762551342+00:00"},"epss":{"cve":"CVE-2026-40247","score":0.00493,"percentile":0.42346,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-x5r2-r74c-3w28","url":"https://osv.dev/vulnerability/GHSA-x5r2-r74c-3w28","summary":"free5gc UDR improper path validation allows unauthenticated access to Traffic Influence Subscriptions","modified":"2026-06-25T23:11:11.044101715Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/udr","purl":"pkg:golang/github.com/free5gc/udr","ranges":["<=1.4.2"],"fixed":[]}]},{"id":"GO-2026-5741","url":"https://osv.dev/vulnerability/GO-2026-5741","summary":"free5gc UDR improper path validation allows unauthenticated access to Traffic Influence Subscriptions in github.com/free5gc/udr","modified":"2026-06-25T23:01:40.966548503Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/udr","purl":"pkg:golang/github.com/free5gc/udr","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."]}