EUVD-2026-67102
GHSA-fmw2-9xj3-hmhv
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NRF SBI endpoint is network-reachable by design with no authentication in default open5gs deployments; impact is availability-only from process crash.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
An integer overflow in the /nnrf-disc/v1/nf-instances component of open5gs v2.7.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted HTTP/2 GET request.
AnalysisAI
Integer overflow in the open5gs 2.7.6 NRF (Network Repository Function) discovery endpoint enables remote unauthenticated denial of service. Sending a crafted HTTP/2 GET request to /nnrf-disc/v1/nf-instances triggers arithmetic overflow that crashes the NRF service, disrupting 5G network function discovery for all dependent core network components. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The open5gs NRF SBI HTTP/2 interface must be reachable by the attacker - the CVSS vector AV:N/AC:L/PR:N/UI:N indicates no authentication is required and exploitation targets default configurations. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H scores 7.5 and accurately captures the unauthenticated, low-complexity network attack path with high availability impact. … 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 patch version has been independently confirmed at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all systems running open5gs 2.7.6 and assess whether the NRF discovery endpoint (/nnrf-disc/v1/nf-instances) is accessible from untrusted networks; enable logging on the affected endpoint. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Denial Of Service
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External POC / Exploit Code
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