{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-56140",
        "ASSIGNER": "security-advisories@github.com",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Astro is a web framework for content-driven websites. In affected versions a bug in Astro\u2019s CSRF-protection middleware allows requests to bypass CSRF checks. When the `security.checkOrigin` configuration option is set to `true`, Astro middleware will perform a CSRF check. However, a vulnerability exists that can bypass this security. A semicolon-delimited parameter is allowed after the type in `Content-Type`. Web browsers will treat a `Content-Type` such as `application/x-www-form-urlencoded; abc` as a `simple request` and will not perform preflight validation. In this case, CSRF is not blocked as expected. Additionally, the `Content-Type` header is not required for a request. This issue has been addressed in version 4.16.17 and all users are advised to upgrade. There are no known workarounds for this vulnerability."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-352: Cross-Site Request Forgery (CSRF)",
                        "cweId": "CWE-352"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "withastro",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "astro",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "< 4.16.17"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw",
                "refsource": "MISC",
                "name": "https://github.com/withastro/astro/security/advisories/GHSA-c4pw-33h3-35xw"
            },
            {
                "url": "https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de",
                "refsource": "MISC",
                "name": "https://github.com/withastro/astro/commit/e7d14c374b9d45e27089994a4eb72186d05514de"
            },
            {
                "url": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests",
                "refsource": "MISC",
                "name": "https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests"
            },
            {
                "url": "https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts",
                "refsource": "MISC",
                "name": "https://github.com/withastro/astro/blob/6031962ab5f56457de986eb82bd24807e926ba1b/packages/astro/src/core/app/middlewares.ts"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-c4pw-33h3-35xw",
        "discovery": "UNKNOWN"
    },
    "impact": {
        "cvss": [
            {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N",
                "version": "3.1"
            }
        ]
    }
}