CVE-2026-41136
Last modified
CVE-2026-41136 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
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/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Free5gc | Amf | < 1.4.3 |
| Free5gc | Free5gc | <= 4.2.1 |
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
- Last Modified
- Status
- Analyzed
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