CVE-2026-41136

MediumCVSS 5.3/10Last modified Oct 26, 2026

Description

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-440

Affected software

Vendor	Product	Versions
free5gc	amf	< 1.4.3

References

https://github.com/free5gc/amf/releases/tag/v1.4.3Product, Release Notes
https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5Exploit, Vendor Advisory
https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5Exploit, Vendor Advisory

Timeline

Published: Apr 22, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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