{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2025-30204",
        "ASSIGNER": "security-advisories@github.com",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "golang-jwt is a Go implementation of JSON Web Tokens. Starting in version 3.2.0 and prior to versions 5.2.2 and 4.5.2, the function parse.ParseUnverified splits (via a call to strings.Split) its argument (which is untrusted data) on periods. As a result, in the face of a malicious request whose Authorization header consists of Bearer  followed by many period characters, a call to that function incurs allocations to the tune of O(n) bytes (where n stands for the length of the function's argument), with a constant factor of about 16. This issue is fixed in 5.2.2 and 4.5.2."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-405: Asymmetric Resource Consumption (Amplification)",
                        "cweId": "CWE-405"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "golang-jwt",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "jwt",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": ">= 3.2.0, < 4.5.2"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": ">= 5.0.0-rc.1, < 5.2.2"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://github.com/golang-jwt/jwt/security/advisories/GHSA-mh63-6h87-95cp",
                "refsource": "MISC",
                "name": "https://github.com/golang-jwt/jwt/security/advisories/GHSA-mh63-6h87-95cp"
            },
            {
                "url": "https://github.com/golang-jwt/jwt/commit/0951d184286dece21f73c85673fd308786ffe9c3",
                "refsource": "MISC",
                "name": "https://github.com/golang-jwt/jwt/commit/0951d184286dece21f73c85673fd308786ffe9c3"
            },
            {
                "url": "https://github.com/golang-jwt/jwt/commit/bf316c48137a1212f8d0af9288cc9ce8e59f1afb",
                "refsource": "MISC",
                "name": "https://github.com/golang-jwt/jwt/commit/bf316c48137a1212f8d0af9288cc9ce8e59f1afb"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-mh63-6h87-95cp",
        "discovery": "UNKNOWN"
    },
    "impact": {
        "cvss": [
            {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
            }
        ]
    }
}