CVE-2026-40246

free5GC is an open-source implementation of the 5G core network. In versions 1.4.2 and below of the UDR service, the handler for deleting 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 is deleted regardless. An unauthenticated attacker with access to the 5G Service Based Interface can delete arbitrary Traffic Influence Subscriptions by supplying any value for the influenceId path segment, while the API misleadingly returns a 404 Not Found response. A patched version was not available at the time of publication.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/free5gc/free5gc/security/advisories/GHSA-g9cw-qwhf-24jp	Exploit Third Party Advisory Mitigation

Configurations

Configuration 1 (hide)

cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*

History

21 Apr 2026, 13:55

Type	Values Removed	Values Added
First Time		Free5gc free5gc Free5gc
CPE		cpe:2.3:a:free5gc:free5gc::::::::
References	~~() https://github.com/free5gc/free5gc/security/advisories/GHSA-g9cw-qwhf-24jp -~~	() https://github.com/free5gc/free5gc/security/advisories/GHSA-g9cw-qwhf-24jp - Exploit, Third Party Advisory, Mitigation
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

16 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-16 22:16

Updated : 2026-04-21 13:55

NVD link : CVE-2026-40246

Mitre link : CVE-2026-40246

CVE.ORG link : CVE-2026-40246

JSON object : View

Products Affected

free5gc

free5gc

CWE

CWE-285

Improper Authorization

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