CVE-2026-1587

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The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. Applying a patch is the recommended action to fix this issue. The issue report is flagged as already-fixed."}, {"lang": "es", "value": "Una vulnerabilidad ha sido encontrada en Open5GS hasta la versi\u00f3n 2.7.6. El elemento afectado es la funci\u00f3n sgwc_s11_handle_modify_bearer_request del archivo /sgwc/s11-handler.c del componente SGWC. La manipulaci\u00f3n conduce a denegaci\u00f3n de servicio. Es posible iniciar el ataque remotamente. El exploit ha sido divulgado al p\u00fablico y puede ser utilizado. Aplicar un parche es la acci\u00f3n recomendada para solucionar este problema. El informe del problema est\u00e1 marcado como ya solucionado."}], "id": "CVE-2026-1587", "lastModified": "2026-06-17T10:16:07.043", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-1587", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-29T14:45:28.087387Z", "version": "2.0.3"}}]}, "published": "2026-01-29T13:15:53.717", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/open5gs/open5gs/"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/open5gs/open5gs/issues/4272"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/open5gs/open5gs/issues/4272#event-21968635948"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/open5gs/open5gs/issues/4272#issue-3795156752"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.343350"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.343350"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.738376"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-404"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T19:48:42.642129+00:00", "value": {"mitigation_remediation": ["Apply the vendor-provided security patch for Open5GS SGWC to fix the modify bearer request handler flaw.", "Restrict external network access to the SGWC S11 interface by configuring firewalls or access\u2011control lists to allow only trusted networks.", "Implement additional application\u2011level checks on modify bearer requests to guard against improper error handling as described by CWE-404."], "summary": {"action": "Patch", "impact": "Denial of Service via remote request handling"}, "threat_synthesis": {"affected_systems": "The issue affects the Open5GS implementation up to version 2.7.6. It specifically targets the SGWC (Serving Gateway Control) module responsible for managing S11 interface messages. Users running Open5GS distributions before the release of a security fix are vulnerable if the SGWC component is exposed to external traffic.", "description_and_impact": "A flaw in the Open5GS SGWC component\u2019s sgwc_s11_handle_modify_bearer_request function allows an attacker to send a specially crafted modify bearer request that triggers a crash, causing the SGWC service to become unavailable. The vulnerability is due to improper handling of certain request parameters, leading to the remote denial of service. It can disrupt traffic routing in cellular networks and affect all subscribers linked to the affected SGWC instance.", "risk_and_exploitability": "The vulnerability has a CVSS score of 6.9, indicating moderate severity. The EPSS score is reported as less than 1%, meaning that exploitation probability is very low but not zero. The configuration requirement is remote access to the SGWC S11 interface, with no additional privileged access needed. The vulnerability is not listed in the CISA KEV catalog, and the exploit has been disclosed publicly."}}}}, "created": "2026-01-30T08:43:05.969094+00:00", "updated": "2026-04-18T20:00:09.279410+00:00", "vendors": ["open5gs", "open5gs$PRODUCT$open5gs"]}