CVE-2026-4531
Free5GC AMF is vulnerable to DoS through its HandleRegistrationComplete function
5.3
MEDIUM
CVSS 3.1
EPSS 0.09%
Description
A weakness has been identified in Free5GC 4.1.0. Affected is the function HandleRegistrationComplete of the file internal/gmm/handler.go of the component AMF. Executing a manipulation can lead to denial of service. The attack may be performed from remote. This patch is called 52e9386401ce56ea773c5aa587d4cdf7d53da799. It is best practice to apply a patch to resolve this issue.
How to fix CVE-2026-4531
To remediate CVE-2026-4531, upgrade the affected package to a fixed version below.
- —upgrade to 1.4.3-0.20260306074636-52e9386401ce or later
Is CVE-2026-4531 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.4.3-0.20260306074636-52e9386401ce
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |