{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-115895",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-23T19:37:27.177Z",
        "datePublished": "2026-10-23T21:32:24.999Z",
        "dateUpdated": "2026-10-23T21:32:24.999Z"
    },
    "containers": {
        "cna": {
            "title": "Happy DOM: Incomplete fix for CVE-2026-33943: unsanitized import alias leads to host code execution",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-94",
                            "lang": "en",
                            "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-834v-8h66-3h79",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-834v-8h66-3h79"
                },
                {
                    "name": "https://github.com/capricorn86/happy-dom/pull/2537",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/capricorn86/happy-dom/pull/2537"
                },
                {
                    "name": "https://github.com/capricorn86/happy-dom/commit/fd163520b74d9fa146be91f7b4e4f46d6cccbe13",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/capricorn86/happy-dom/commit/fd163520b74d9fa146be91f7b4e4f46d6cccbe13"
                },
                {
                    "name": "https://github.com/capricorn86/happy-dom/releases/tag/v21.0.4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/capricorn86/happy-dom/releases/tag/v21.0.4"
                }
            ],
            "affected": [
                {
                    "vendor": "capricorn86",
                    "product": "happy-dom",
                    "versions": [
                        {
                            "version": ">= 17.0.0, < 21.0.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-23T21:32:24.999Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. From 17.0.0 until 21.0.4, packages/happy-dom/src/module/ECMAScriptModuleCompiler.ts accepts a named ESM import alias without validating that it is a JavaScript binding identifier before inserting it into a generated destructuring binding. With enableJavaScriptEvaluation enabled, attacker-controlled HTML or module source can use an invalid alias that becomes a valid default initializer after compilation, causing the generated JavaScript to execute in the Node.js host process. The demonstrated reachable path uses a JSON module import attribute, which prevents the malicious alias from being emitted again in a later ESM circular-import assignment and keeps the generated function syntactically valid. This incomplete fix for CVE-2026-33943 is a distinct residual path because the earlier remediation validated the local export importName path but not the named-import alias. This issue is fixed in version 21.0.4."
                }
            ],
            "source": {
                "advisory": "GHSA-834v-8h66-3h79",
                "discovery": "UNKNOWN"
            }
        }
    }
}