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CVE-2026-42459: free5gc before 4.2.2 (exclusive), < 4.2.2
CVE-2026-42459. CVSS 3.1 base score 7.5 (HIGH, NVD). EPSS 0.00448 (percentile 0.37211), scored 13-Oct-2026.
Affected technology
free5gc · before 4.2.2 (exclusive)
free5gc
free5gc · < 4.2.2
free5gc
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required
What an attacker can do
An unauthenticated attacker can inject control characters into the SUPI parameter, causing UDM to forward a malformed request to UDR and return a 500 Internal Server Error response that exposes internal infrastructure details. Vendor/CNA’s CVSS 4.0 assessment (base score 7.7/10) rates confidentiality impact as high; integrity and availability impact as none.
- CWE
- CWE-20, CWE-209
- CCR priority
- 30.1 /100 (P4)
- CVSS 3.1
- 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · NVD
- EPSS
- 0.00448 · percentile 0.37211 · 2026-10-13
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-15 01:07:31.726917+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-42459.html