What is CVE-2026-42459?

CVE-2026-42459 is a high-severity vulnerability in Free5gc, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-05-27.

How severe is CVE-2026-42459?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Free5gc

CVE-2026-42459

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the free5GC UDM component fails to validate the supi path parameter in six GET handlers of the nudm-sdm (Subscriber Data Management) service. An unauthenticat…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.002 (36.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Free5gc — versions < 4.2.2

Weakness classification (CWE)

CWE-20 — Improper Input Validation
CWE-209 — Generation of Error Message Containing Sensitive Information

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42459?: CVE-2026-42459 is a high-severity vulnerability in Free5gc, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-05-27.
How severe is CVE-2026-42459?: High severity. CVSS v3 base score is 7.5 out of 10.