EUVD-2026-67106
GHSA-j2x4-qjcx-gcw4
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-accessible REST API with no authentication per input CVSS vector; single request achieves full availability loss with zero confidentiality or integrity impact.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
An issue in the CreateUEContextProcedure function (/v1/ue-contexts/{supi}) of free5gc v4.1.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted PUT request.
AnalysisAI
Denial of service in free5gc v4.1.0 allows unauthenticated remote attackers to crash the UE context management service by sending a crafted HTTP PUT request to the /v1/ue-contexts/{supi} REST API endpoint, invoking the CreateUEContextProcedure function. The root cause is CWE-770 - uncontrolled resource allocation - where a malformed request triggers unchecked resource consumption that terminates the AMF process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target must be running free5gc v4.1.0 with the AMF component reachable over the network on its SBI HTTP port. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 High score with vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H is consistent with the description: a single crafted PUT request from any network-reachable host can crash the AMF, causing total loss of UE context management and denying connectivity to all attached user equipment in a live deployment. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patched version has been identified at the time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all free5gc v4.1.0 deployments and implement firewall or WAF rules restricting network access to the /v1/ue-contexts REST API endpoint to trusted sources only. …
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External POC / Exploit Code
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