{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-27942",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-02-25T03:11:36.689Z",
        "datePublished": "2026-02-26T01:22:11.383Z",
        "dateUpdated": "2026-06-23T15:50:01.617Z"
    },
    "containers": {
        "cna": {
            "title": "fast-xml-parser has stack overflow in XMLBuilder with preserveOrder",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-120",
                            "lang": "en",
                            "description": "CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 2.7,
                        "baseSeverity": "LOW",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-fj3w-jwp8-x2g3",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-fj3w-jwp8-x2g3"
                },
                {
                    "name": "https://github.com/NaturalIntelligence/fast-xml-parser/pull/791",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/NaturalIntelligence/fast-xml-parser/pull/791"
                },
                {
                    "name": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f14986295dd28484eee830fa1a0e8a",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/c13a961910f14986295dd28484eee830fa1a0e8a"
                }
            ],
            "affected": [
                {
                    "vendor": "NaturalIntelligence",
                    "product": "fast-xml-parser",
                    "versions": [
                        {
                            "version": "< 5.3.8",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-02-26T01:22:11.383Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. Prior to version 5.3.8, the application crashes with stack overflow when user use XML builder with `preserveOrder:true`. Version 5.3.8 fixes the issue. As a workaround, use XML builder with `preserveOrder:false` or check the input data before passing to builder."
                }
            ],
            "source": {
                "advisory": "GHSA-fj3w-jwp8-x2g3",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-02-26T15:48:57.198872Z",
                                "id": "CVE-2026-27942",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-06-23T15:50:01.617Z"
                }
            }
        ]
    }
}