{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53964",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-11T15:50:01.282Z",
        "datePublished": "2026-10-01T19:55:07.504Z",
        "dateUpdated": "2026-10-01T20:13:16.003Z"
    },
    "containers": {
        "cna": {
            "title": "Document Merge Service vulnerable to RCE via SSTI (xlsx tempaltes)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-1336",
                            "lang": "en",
                            "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.2,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "HIGH",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/adfinis/document-merge-service/security/advisories/GHSA-w47q-945m-q9pc",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/adfinis/document-merge-service/security/advisories/GHSA-w47q-945m-q9pc"
                },
                {
                    "name": "https://github.com/adfinis/document-merge-service/releases/tag/v9.1.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/adfinis/document-merge-service/releases/tag/v9.1.0"
                }
            ],
            "affected": [
                {
                    "vendor": "adfinis",
                    "product": "document-merge-service",
                    "versions": [
                        {
                            "version": "< 9.1.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-01T19:55:07.504Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Document Merge Service is a document template merge service providing an API to manage templates and merge them with given data. Prior to version 9.1.0, a remote code execution (RCE) via server-side template injection (SSTI) allows for user supplied code to be executed in the server's context where it is executed as the document-merge-server user with the UID 901 thus giving an attacker considerable control over the container. The vulnerability is limited to XLSX templates, were the xltpl library uses a npn-sandboxed Jinja environment for the processing of the template. This issue has been patched in version 9.1.0."
                }
            ],
            "source": {
                "advisory": "GHSA-w47q-945m-q9pc",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-01T20:12:41.561346Z",
                                "id": "CVE-2026-53964",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-01T20:13:16.003Z"
                }
            }
        ]
    }
}