{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-33937",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-03-24T19:50:52.103Z",
        "datePublished": "2026-03-27T21:03:46.748Z",
        "dateUpdated": "2026-03-27T21:03:46.748Z"
    },
    "containers": {
        "cna": {
            "title": "Handlebars.js has JavaScript Injection via AST Type Confusion",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-843",
                            "lang": "en",
                            "description": "CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "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": 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/handlebars-lang/handlebars.js/security/advisories/GHSA-2w6w-674q-4c4q",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/handlebars-lang/handlebars.js/security/advisories/GHSA-2w6w-674q-4c4q"
                },
                {
                    "name": "https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/handlebars-lang/handlebars.js/commit/68d8df5a88e0a26fe9e6084c5c6aaebe67b07da2"
                },
                {
                    "name": "https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/handlebars-lang/handlebars.js/releases/tag/v4.7.9"
                }
            ],
            "affected": [
                {
                    "vendor": "handlebars-lang",
                    "product": "handlebars.js",
                    "versions": [
                        {
                            "version": ">= 4.0.0, < 4.7.9",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-03-27T21:03:46.748Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Handlebars provides the power necessary to let users build semantic templates. In versions 4.0.0 through 4.7.8, `Handlebars.compile()` accepts a pre-parsed AST object in addition to a template string. The `value` field of a `NumberLiteral` AST node is emitted directly into the generated JavaScript without quoting or sanitization. An attacker who can supply a crafted AST to `compile()` can therefore inject and execute arbitrary JavaScript, leading to Remote Code Execution on the server. Version 4.7.9 fixes the issue. Some workarounds are available. Validate input type before calling `Handlebars.compile()`; ensure the argument is always a  `string`, never a plain object or JSON-deserialized value. Use the Handlebars runtime-only build (`handlebars/runtime`) on the server if templates are pre-compiled at build time; `compile()` will be unavailable."
                }
            ],
            "source": {
                "advisory": "GHSA-2w6w-674q-4c4q",
                "discovery": "UNKNOWN"
            }
        }
    }
}