CVE-2026-40343
MEDIUM EPSS 95.0%
Published Apr 22, 20262mo ago · Modified Jun 17, 20261w ago
6.9 CVSS 4.0
Published Apr 22, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago
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 Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
95.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-754
Affected Products 2
References 1
- github.com https://github.com/free5gc/free5gc/security/advisories/GHSA-jwch-w7wh-gqjm
Remediation
- github.com https://github.com/free5gc/free5gc/security/advisories/GHSA-jwch-w7wh-gqjm