Detections
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SCA: security update for github.com/free5gc/udm (GHSA-p9hg-pq3q-v9gv)

high Tenable Self-Hosted Container Security Plugin ID 438970

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions
 prior to 1.4.2 are vulnerable to null byte injection in URL path parameters. A remote attacker can inject
 null bytes (URL-encoded as %00) into the supi path parameter of the UDM's Nudm_SubscriberDataManagement
 API. This causes URL parsing failure in Go's net/url package with the error "invalid control character in
 URL", resulting in a 500 Internal Server Error. This null byte injection vulnerability can be exploited
 for denial of service attacks. When the supi parameter contains null characters, the UDM attempts to
 construct a URL for UDR that includes these control characters. Go's URL parser rejects them, causing the
 request to fail with 500 instead of properly validating input and returning 400 Bad Request. This issue
 has been fixed in version 1.4.2. (CVE-2026-33191)

Solution

Update the github.com/free5gc/udm library and its related packages to version 1.4.2 or later.

See Also

https://github.com/advisories/GHSA-p9hg-pq3q-v9gv

Plugin Details

Severity: High

ID: 438970

Version: Revision 1.11

Type: Local

Family: SCA Checks

Published: 3/19/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.3

Percentile: 51.27

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-33191

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: 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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/18/2026

Vulnerability Publication Date: 3/18/2026

Reference Information

CVE: CVE-2026-33191