Vulnerability-Lookup

CVE-2026-80465 (GCVE-0-2026-80465)

Vulnerability from cvelistv5 – Published: 2026-09-03 11:25 – Updated: 2026-09-03 11:25

Summary

A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions < V4.2.3), Mendix SAML (Mendix 11 compatible) (All versions < V4.2.3), Mendix SAML (Mendix 9.24 compatible) (All versions < V3.6.27). Affected versions of the module do not properly validate the SAML response signature. This could allow unauthenticated remote attackers to hijack an account (session) in specific SSO configurations.

Severity

8.7 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

siemens icscert root

References

1 reference

URL	Tags
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version	CPE status
Siemens	Mendix SAML (Mendix 10 compatible)	Affected: 0 , < V4.2.3 (custom)	guessed
Siemens	Mendix SAML (Mendix 11 compatible)	Affected: 0 , < V4.2.3 (custom)	guessed
Siemens	Mendix SAML (Mendix 9.24 compatible)	Affected: 0 , < V3.6.27 (custom)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Mendix SAML (Mendix 10 compatible)",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V4.2.3",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "Mendix SAML (Mendix 11 compatible)",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V4.2.3",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "Mendix SAML (Mendix 9.24 compatible)",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "V3.6.27",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.3), Mendix SAML (Mendix 11 compatible) (All versions \u003c V4.2.3), Mendix SAML (Mendix 9.24 compatible) (All versions \u003c V3.6.27). Affected versions of the module do not properly validate the SAML response signature. This could allow unauthenticated remote attackers to hijack an account (session) in specific SSO configurations."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          }
        },
        {
          "cvssV4_0": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T11:25:10.771Z",
        "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
        "shortName": "siemens"
      },
      "references": [
        {
          "url": "https://cert-portal.siemens.com/productcert/html/ssa-887643.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
    "assignerShortName": "siemens",
    "cveId": "CVE-2026-80465",
    "datePublished": "2026-09-03T11:25:10.771Z",
    "dateReserved": "2026-08-26T12:49:28.232Z",
    "dateUpdated": "2026-09-03T11:25:10.771Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80465\",\"sourceIdentifier\":\"productcert@siemens.com\",\"published\":\"2026-09-03T13:06:10.877\",\"lastModified\":\"2026-09-03T13:06:10.877\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability has been identified in Mendix SAML (Mendix 10 compatible) (All versions \u003c V4.2.3), Mendix SAML (Mendix 11 compatible) (All versions \u003c V4.2.3), Mendix SAML (Mendix 9.24 compatible) (All versions \u003c V3.6.27). Affected versions of the module do not properly validate the SAML response signature. This could allow unauthenticated remote attackers to hijack an account (session) in specific SSO configurations.\"}],\"affected\":[{\"source\":\"productcert@siemens.com\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"Mendix SAML (Mendix 10 compatible)\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V4.2.3\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"Mendix SAML (Mendix 11 compatible)\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V4.2.3\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"Mendix SAML (Mendix 9.24 compatible)\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V3.6.27\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"productcert@siemens.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/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\":\"HIGH\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"HIGH\",\"subIntegrityImpact\":\"HIGH\",\"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\":\"productcert@siemens.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N\",\"baseScore\":8.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":5.8}]},\"weaknesses\":[{\"source\":\"productcert@siemens.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-347\"}]}],\"references\":[{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-887643.html\",\"source\":\"productcert@siemens.com\"}]}}"
  }
}

SSA-887643

Vulnerability from csaf_siemens - Published: 2026-09-03 00:00 - Updated: 2026-09-03 00:00

Summary

SSA-887643: Account Hijacking Vulnerability in Mendix SAML module

Notes

Summary: Mendix SAML module contains a vulnerability that could allow unauthenticated remote attackers to hijack an account in specific SSO configurations. Mendix has provided fix releases for the Mendix SAML module and recommends to update to the latest version.

General Recommendations: As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

Additional Resources: For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories

Terms of Use: The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.

CVE-2026-80465

Affected versions of the module do not properly validate the SAML response signature. This could allow unauthenticated remote attackers to hijack an account (session) in specific SSO configurations.

8.7 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

CWE-347 - Improper Verification of Cryptographic Signature

Affected products

Known affected 3 products

Product	Version	Remediation
Mendix SAML (Mendix 10 compatible) < V4.2.3 Siemens / Mendix SAML (Mendix 10 compatible)	vers:intdot/<4.2.3	Vendor Fix fix
Mendix SAML (Mendix 11 compatible) < V4.2.3 Siemens / Mendix SAML (Mendix 11 compatible)	vers:intdot/<4.2.3	Vendor Fix fix
Mendix SAML (Mendix 9.24 compatible) < V3.6.27 Siemens / Mendix SAML (Mendix 9.24 compatible)	vers:intdot/<3.6.27	Vendor Fix fix

References

2 references

URL	Category
https://cert-portal.siemens.com/productcert/html/…	self
https://cert-portal.siemens.com/productcert/csaf/…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited. (TLPv2: TLP:CLEAR)",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Mendix SAML module contains a vulnerability that could allow unauthenticated remote attackers to hijack an account in specific SSO configurations.\n\nMendix has provided fix releases for the Mendix SAML module and recommends to update to the latest version.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\n\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
      {
        "category": "general",
        "text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "productcert@siemens.com",
      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-887643: Account Hijacking Vulnerability in Mendix SAML module - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-887643.html"
      },
      {
        "category": "self",
        "summary": "SSA-887643: Account Hijacking Vulnerability in Mendix SAML module - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-887643.json"
      }
    ],
    "title": "SSA-887643: Account Hijacking Vulnerability in Mendix SAML module",
    "tracking": {
      "current_release_date": "2026-09-03T00:00:00.000Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-887643",
      "initial_release_date": "2026-09-03T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-09-03T00:00:00.000Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "interim",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c4.2.3",
                "product": {
                  "name": "Mendix SAML (Mendix 10 compatible) \u003c V4.2.3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix SAML (Mendix 10 compatible)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c4.2.3",
                "product": {
                  "name": "Mendix SAML (Mendix 11 compatible) \u003c V4.2.3",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix SAML (Mendix 11 compatible)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:intdot/\u003c3.6.27",
                "product": {
                  "name": "Mendix SAML (Mendix 9.24 compatible) \u003c V3.6.27",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "Mendix SAML (Mendix 9.24 compatible)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-80465",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "notes": [
        {
          "category": "description",
          "text": "Affected versions of the module do not properly validate the SAML response signature. This could allow unauthenticated remote attackers to hijack an account (session) in specific SSO configurations.",
          "title": "CVE Description"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V3.6.27 or later version",
          "product_ids": [
            "3"
          ],
          "url": "https://marketplace.mendix.com/link/component/1174"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.2.3 or later version",
          "product_ids": [
            "1"
          ],
          "url": "https://marketplace.mendix.com/link/component/1174"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.2.3 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://marketplace.mendix.com/link/component/1174"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3"
          ]
        }
      ],
      "title": "CVE-2026-80465"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-80465 (GCVE-0-2026-80465)

SSA-887643

Tags

Sightings

Nomenclature