EUVD-2026-67114
GHSA-74j6-gp9p-c9w9
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-accessible unauthenticated DoS with no confidentiality or integrity impact; low complexity matches the straightforward input validation bypass described.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
5DescriptionCVE.org
Improper input validation in the buildFilter function (processor/processor.go) of free5gc v4.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.
AnalysisAI
Denial of service in free5gc v4.0.1 allows unauthenticated remote attackers to crash the 5G core network processor by sending a crafted input to the buildFilter function in processor/processor.go. The flaw stems from improper input validation (CWE-20), meaning the function does not adequately sanitize or reject malformed data before processing it, causing an unrecoverable failure of the affected network function. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special authentication is required - the CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms this is remotely exploitable by unauthenticated attackers with no user interaction against default configurations of free5gc v4.0.1. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.5 High score reflects a network-accessible, unauthenticated attack with high availability impact and low complexity - metrics that on their face demand prompt attention. … 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 | Administrators running free5gc v4.0.1 should consult the upstream GitHub issue at https://github.com/free5gc/free5gc/issues/770 for patch status and any available fix - no released patched version has been independently confirmed from the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all production systems running free5gc v4.0.1 and implement network-level access controls restricting inbound access to core processors to trusted sources only. …
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today