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Open5GS EUVDEUVD-2026-41657

| CVE-2026-14618 LOW
Improper Resource Shutdown or Release (CWE-404)
2026-07-04 VulDB GHSA-8r39-w67j-g66v
Denial Of Service Open5gs
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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
vuln.today AI
4.3 MEDIUM

Network-reachable SBI interface (AV:N), low-privilege SBI access required (PR:L), no confidentiality or integrity impact, only availability disruption (A:L).

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Severity Changed
Jul 04, 2026 - 07:22 NVD
MEDIUM LOW
CVSS changed
Jul 04, 2026 - 07:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
Analysis Generated
Jul 04, 2026 - 06:51 vuln.today

DescriptionCVE.org

A vulnerability was detected in Open5GS up to 2.7.7. Affected by this vulnerability is the function amf_nnrf_handle_nf_discover of the file src/amf/nnrf-handler.c of the component AMF. The manipulation results in denial of service. The attack may be launched remotely. The exploit is now public and may be used. The patch is identified as fb5f67703de0213fb9c6e6ef3b48b6c1707e9503. It is best practice to apply a patch to resolve this issue.

AnalysisAI

Denial of service in the Open5GS AMF component (versions up to 2.7.7) can be triggered remotely by a low-privileged attacker via improper resource handling in the amf_nnrf_handle_nf_discover function of src/amf/nnrf-handler.c. The AMF is a critical 5G core control-plane element; crashing or hanging it disrupts mobility management and NF discovery for all connected UEs and network functions. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Gain access to 5G SBI network
Delivery
Craft malformed NRF NF discovery response
Exploit
Send response to AMF Nnrf handler
Execution
Trigger improper resource release in amf_nnrf_handle_nf_discover
Impact
AMF process crashes, denying service
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Vulnerability AssessmentAI

Exploitation The CVSS 4.0 vector specifies PR:L, meaning some form of low-privileged access to the 5G service-based interface (SBI) or the AMF's NRF discovery endpoint is required - unauthenticated exploitation is not indicated by the available data. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 5.3 (Medium) is supported by the vector: network-reachable (AV:N), low complexity (AC:L), low privilege required (PR:L), no user interaction (UI:N), and low availability impact on the vulnerable system (VA:L) with no confidentiality or integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with low-privileged access to the 5G service-based interface sends a crafted or malformed NF discovery response toward the AMF's Nnrf handler, triggering the improper resource release condition in `amf_nnrf_handle_nf_discover`. The AMF process crashes or enters a degraded state, dropping all active UE sessions and preventing new registrations until the service is restarted. …
Remediation Apply the patch identified as commit `fb5f67703de0213fb9c6e6ef3b48b6c1707e9503`, currently available in a contributor fork at https://github.com/ferrancanellas/open5gs/commit/fb5f67703de0213fb9c6e6ef3b48b6c1707e9503. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-41657 vulnerability details – vuln.today
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