CVE-2026-42459

7.5 HIGH

free5GC is an open-source implementation of the 5G core network

Published: 2026-05-27 · Last updated: 2026-05-28

Severity and scoring

CVSS: 7.5 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE: CWE-20, CWE-209

Affected products

Vendor	Product
free5gc	free5gc

Description

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 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. This vulnerability is fixed in 4.2.2.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-42459
[Vendor advisory]https://github.com/free5gc/free5gc/security/advisories/GHSA-585v-hcgf-jhfr
[Vendor advisory]https://github.com/free5gc/free5gc/security/advisories/GHSA-585v-hcgf-jhfr

Related CVEs

Same vendor

CVE-2026-44330 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
CVE-2026-44329 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
CVE-2026-44328 — free5GC is an open-source implementation of the 5G core network (8.2 HIGH)
CVE-2026-44327 — free5GC is an open-source implementation of the 5G core network (10.0 CRITICAL)
CVE-2026-44326 — free5GC is an open-source implementation of the 5G core network (9.4 CRITICAL)

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