CVE-2026-33191
free5GC UDM vulnerable to null byte injection in URL path parameters causing 500 Internal Server Error in github.com/free5gc/udm
EPSS 0.20%
Description
free5GC UDM vulnerable to null byte injection in URL path parameters causing 500 Internal Server Error in github.com/free5gc/udm
How to fix CVE-2026-33191
To remediate CVE-2026-33191, upgrade the affected package to a fixed version below.
- Go/github.com/free5gc/udm—upgrade to 1.4.2 or later
- Go/github.com/free5gc/udm—upgrade to 1.4.2 or later
Is CVE-2026-33191 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.4.2
- from 0, < 1.4.2
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:H/SC:N/SI:N/SA:N |