CVE Catalog

CVE-2026-41136

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.28%

21th percentile - higher than 21% of all known CVEs

Summary

free5GC AMF prior to version 1.4.3 has a flaw in the HTTPUEContextTransfer handler where the missing default case in the Content-Type switch causes deserialization to be skipped and the processor invoked with an uninitialized UeContextTransferRequest object. This can lead to unexpected behavior or crashes. Version 1.4.3 contains a fix.

Risk Assessment

An attacker can send a request with an unsupported Content-Type, potentially causing processing errors and destabilizing the AMF service. This could lead to denial of service or improper functioning of mobility management functions.

Recommendation

Update free5GC AMF to version 1.4.3 or later, which includes the fix. No workarounds exist — updating is recommended.

Related vulnerabilities

Original NVD description (English source)

free5GC AMF provides Access & Mobility Management Function (AMF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Prior to version 1.4.3, the `HTTPUEContextTransfer` handler in `internal/sbi/api_communication.go` does not include a `default` case in the `Content-Type` switch statement. When a request arrives with an unsupported `Content-Type`, the deserialization step is silently skipped, `err` remains `nil`, and the processor is invoked with a completely uninitialized `UeContextTransferRequest` object. Version 1.4.3 contains a fix.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS