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CVE-2026-41135 - Vulnerability Analysis

HighCVSS: 7.5

Last Updated: April 23, 2026

free5GC UDR - Denial of Service

Published: April 22, 2026Updated: April 23, 2026PoC AvailableRemote Exploitable

Overview

free5GC UDR < 1.4.3 contains a memory leak caused by repeated registration of CORS middleware in the HTTP handler, letting unauthenticated attackers with network access cause denial of service by exhausting memory.

Severity & Score

Severity: High

CVSS Score: 7.5

Impact

Unauthenticated attackers can cause memory exhaustion leading to denial of service and blocking 5G session establishment.

Mitigation

Upgrade to version 1.4.3 or later.

References

https://github.com/free5gc/pcf/commit/599803b1b2eb4611e26d5216481ee142bce71a16
https://github.com/free5gc/free5gc/security/advisories/GHSA-98cp-84m9-q3qp

Related Resources

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Details

CVE ID: CVE-2026-41135
Severity: High
CVSS Score: 7.5
Type: undefined
Status: confirmed

CWE

CWE-400

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H