{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-108358",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-09T20:32:44.301Z",
        "datePublished": "2026-10-22T17:29:56.449Z",
        "dateUpdated": "2026-10-22T17:29:56.449Z"
    },
    "containers": {
        "cna": {
            "title": "PhpSpreadsheet: XmlScanner Bypass via ISO-2022 Escape Sequences Allows XXE and Denial of Service",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-611",
                            "lang": "en",
                            "description": "CWE-611: Improper Restriction of XML External Entity Reference",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-776",
                            "lang": "en",
                            "description": "CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "LOW",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:L/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-3x94-m842-937c"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/89f455c133e1a7e2d4abfadc43ce29eb7450d781"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8"
                },
                {
                    "name": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.10.0"
                }
            ],
            "affected": [
                {
                    "vendor": "PHPOffice",
                    "product": "PhpSpreadsheet",
                    "versions": [
                        {
                            "version": "< 1.30.7",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.0.0, < 2.1.19",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.2.0, < 2.4.8",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.3.0, < 3.10.8",
                            "status": "affected"
                        },
                        {
                            "version": ">= 4.0.0, < 5.10.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-22T17:29:56.449Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0, XmlScanner::scan in src/PhpSpreadsheet/Reader/Security/XmlScanner.php uses a DOCTYPE detection pattern that accounts for NUL-byte interleaving but not ISO-2022 escape sequences in XLSX XML parts. The escape sequences prevent the scanner from matching the declaration, and XML charset normalization then removes the escape bytes before parsing, exposing a valid DOCTYPE and entity definitions. Processing an attacker-controlled XLSX can therefore cause entity-expansion denial of service on supported PHP versions and can permit local file access or SSRF on PHP before 8.0 or when LIBXML_NOENT is enabled. This issue is fixed in versions 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0."
                }
            ],
            "source": {
                "advisory": "GHSA-3x94-m842-937c",
                "discovery": "UNKNOWN"
            }
        }
    }
}