{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-44267",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-05T16:33:55.845Z",
        "datePublished": "2026-11-03T17:52:25.509Z",
        "dateUpdated": "2026-11-03T17:52:25.509Z"
    },
    "containers": {
        "cna": {
            "title": "Elo: Sandbox escape to arbitrary Node.js / browser code execution via unfiltered `.constructor` member access in Elo JavaScript emitter",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "lang": "en",
                            "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-94",
                            "lang": "en",
                            "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-693",
                            "lang": "en",
                            "description": "CWE-693: Protection Mechanism Failure",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "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": 9.8,
                        "baseSeverity": "CRITICAL",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/enspirit/elo/security/advisories/GHSA-33r5-xmm8-v6x5",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/enspirit/elo/security/advisories/GHSA-33r5-xmm8-v6x5"
                },
                {
                    "name": "https://github.com/enspirit/elo/commit/2136da1f64eec8ebf99890d3100be9394534b842",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/enspirit/elo/commit/2136da1f64eec8ebf99890d3100be9394534b842"
                },
                {
                    "name": "https://github.com/enspirit/elo/commit/d2a89a8db76a244eb740687524a7e8529b7554b5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/enspirit/elo/commit/d2a89a8db76a244eb740687524a7e8529b7554b5"
                }
            ],
            "affected": [
                {
                    "vendor": "enspirit",
                    "product": "elo",
                    "versions": [
                        {
                            "version": "< 1.0.1",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-11-03T17:52:25.509Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Elo is a purely functional expression language for no-code tools. Prior to 1.0.1, plain Elo strings supplied to defaultFormats.elo.parse(), bin/elo, or elo-lang.org/try can use .constructor.constructor to reach JavaScript Function because the member_access handler in src/transform.ts does not reject meta-properties, src/compilers/javascript.ts emits the surviving property directly, and src/parser.ts accepts constructor as an ordinary identifier. The resulting generated JavaScript executes attacker-selected code in the host runtime. This permits browser script execution and session compromise on the auto-running playground and arbitrary Node.js code execution on library, CI, or DevOps hosts. This plain-string path is distinct from the programmatic AST-object injection issue. This issue is fixed in version 1.0.1."
                }
            ],
            "source": {
                "advisory": "GHSA-33r5-xmm8-v6x5",
                "discovery": "UNKNOWN"
            }
        }
    }
}