free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the PUT handler for updating Policy Data notification subscriptions at /nudr-dr/v2/policy-data/subs-to-notify/{subsId} does not return after request body retrieval or deserialization errors. Although HTTP 500 or 400 error responses are sent, execution continues and the processor is invoked with a potentially uninitialized or partially initialized PolicyDataSubscription object. This fail-open behavior may allow unintended modification of existing Policy Data notification subscriptions with invalid or empty input, depending on downstream processor and storage behavior. A patched version was not available at the time of publication.
References
| Link | Resource |
|---|---|
| https://github.com/free5gc/free5gc/security/advisories/GHSA-gx38-8h33-pmxr | Exploit Third Party Advisory Mitigation |
Configurations
History
21 Apr 2026, 13:51
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.3 |
| References | () https://github.com/free5gc/free5gc/security/advisories/GHSA-gx38-8h33-pmxr - Exploit, Third Party Advisory, Mitigation | |
| CPE | cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:* | |
| First Time |
Free5gc free5gc
Free5gc |
16 Apr 2026, 22:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-16 22:16
Updated : 2026-04-21 13:51
NVD link : CVE-2026-40249
Mitre link : CVE-2026-40249
CVE.ORG link : CVE-2026-40249
JSON object : View
Products Affected
free5gc
- free5gc