{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89209", "assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "state": "PUBLISHED", "assignerShortName": "siemens", "dateReserved": "2026-09-11T07:45:20.919Z", "datePublished": "2026-10-26T10:41:01.088Z", "dateUpdated": "2026-10-26T10:41:01.088Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "shortName": "siemens", "dateUpdated": "2026-10-26T10:41:01.088Z"}, "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions < V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions < V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions < V3.6.29). Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAML response."}], "affected": [{"vendor": "Siemens", "product": "Mendix SAML (Mendix 10 compatible)", "versions": [{"status": "affected", "version": "0", "lessThan": "V4.2.4", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "Mendix SAML (Mendix 11 compatible)", "versions": [{"status": "affected", "version": "0", "lessThan": "V4.2.4", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "Mendix SAML (Mendix 9 compatible)", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.6.29", "versionType": "custom"}], "defaultStatus": "unknown"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "baseScore": 6.8, "baseSeverity": "MEDIUM"}}, {"cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N", "baseScore": 7.6, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-294", "description": "CWE-294: Authentication Bypass by Capture-replay", "type": "CWE"}]}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-137528.html"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "Mendix SAML (Mendix 10 compatible)", "vendor": "Siemens", "versions": [{"lessThan": "V4.2.4", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "Mendix SAML (Mendix 11 compatible)", "vendor": "Siemens", "versions": [{"lessThan": "V4.2.4", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "Mendix SAML (Mendix 9 compatible)", "vendor": "Siemens", "versions": [{"lessThan": "V3.6.29", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions < V4.2.4), Mendix SAML (Mendix 11 compatible) (All versions < V4.2.4), Mendix SAML (Mendix 9 compatible) (All versions < V3.6.29). Affected versions of the module do not properly protect against SAML assertion replay in IdP-initiated authentication flows. This could allow unauthenticated remote attackers to gain unauthorized access to the application by replaying a valid SAML response."}], "id": "CVE-2026-89209", "lastModified": "2026-10-26T11:16:38.583", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.2, "source": "[email protected]", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "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": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-10-26T11:16:38.583", "references": [{"source": "[email protected]", "url": "https://cert-portal.siemens.com/productcert/html/ssa-137528.html"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-294"}], "source": "[email protected]", "type": "Primary"}]}

{}

{"created": "2026-10-26T12:45:14.325979+00:00", "title": "SAML Assertion Replay Vulnerability in Siemens Mendix SAML Module", "updated": "2026-10-26T12:45:14.325991+00:00", "vendors": []}