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    CVE-2026-41136

    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.

    Published:Apr 21, 2026
    Last Modified:Apr 23, 2026
    EPS:Apr 21, 2026
    EPSS Score:0.00039
    CVSS Score:5.3

    Affected Products

    Vendor
    Free5gc
    Product
    Amf
    Vendor
    Free5gc
    Product
    Free5gc

    Exploits

    https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5

    Common Weakness Enumeration

    CWE-440 Expected Behavior Violation

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High