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CVE-2026-41136

free5GC AMF missing default case in Content-Type switch in HTTPUEContextTransfer

Published: Apr 21, 2026Updated: Apr 23, 2026 Sources: CVE List NVDCWE-440
5.3MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 79.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-440

Affected Products

free5gc
oss-projectaka free5gc udm, free5gc smf, smf, udm
amfOn-premNetwork Device
Networking Infrastructure / router-switch
free5gcOn-premNetwork Device
Networking Infrastructure / router-switch

Exploitability

Official Patch Available

References

https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5
github.com
https://github.com/free5gc/amf/releases/tag/v1.4.3
github.com

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