{"cve":"CVE-2026-40343","nvd":{"published":"2026-04-22T00:16:27.670","modified":"2026-10-26T22:10:00.163","status":"Analyzed","description":"free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.2, a fail-open request handling flaw in the UDR service causes the `/nudr-dr/v2/policy-data/subs-to-notify` POST handler to continue processing requests even after request body retrieval or deserialization errors. This may allow unintended creation of Policy Data notification subscriptions with invalid, empty, or partially processed input, depending on downstream processor behavior. As of time of publication, a patched version is not available.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","score":5.8},"cwes":["CWE-754"],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-jwch-w7wh-gqjm"],"products":["free5gc:free5gc","free5gc:udr"],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-40343","score":0.08627,"percentile":0.95065,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-jwch-w7wh-gqjm","url":"https://osv.dev/vulnerability/GHSA-jwch-w7wh-gqjm","summary":"free5GC UDR: Fail-open handling in PolicyDataSubsToNotifyPost allows unintended subscription creation","modified":"2026-06-25T23:11:35.406272044Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/udr","purl":"pkg:golang/github.com/free5gc/udr","ranges":["<=1.4.2"],"fixed":[]}]},{"id":"GO-2026-5482","url":"https://osv.dev/vulnerability/GO-2026-5482","summary":"free5GC UDR: Fail-open handling in PolicyDataSubsToNotifyPost allows unintended subscription creation in github.com/free5gc/udr","modified":"2026-06-25T23:01:15.567081284Z","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."]}