EUVD-2026-67115
GHSA-2vh6-x42r-j878
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NRF Discovery is a network-reachable HTTP service requiring no authentication; impact is limited to availability only, with no confidentiality or integrity effect.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
An issue in the complexQueryFilterSubprocess function in the NRF Discovery service of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.
AnalysisAI
Remote unauthenticated denial-of-service in the NRF Discovery service of free5gc v4.0.1 can be triggered by sending crafted input to the complexQueryFilterSubprocess function, crashing the service without any authentication or user interaction. The NRF (Network Repository Function) is a critical 5G core component responsible for service discovery; its disruption can cascade to affect the entire 5G core network's ability to register and locate network functions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication is required - the CVSS vector (PR:N) confirms unauthenticated exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) reflects a worst-case scenario: the NRF is network-reachable, no authentication is required, and exploitation is straightforward. … 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 time of analysis; the only reference is a GitHub issue (#771 at https://github.com/free5gc/free5gc/issues/771) with no associated merged fix PR or tagged release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all instances of free5gc v4.0.1 in production and non-production environments; restrict network access to the NRF to only authorized internal network functions; enable logging and alerting on NRF service availability and error rates. …
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External POC / Exploit Code
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