Axios: XSRF Token Cross-Origin Leakage via Prototype Pollution Gadget in `withXSRFToken` Boolean Coercion_CVE-2026-42042

{
    "lastseen": "",
    "description": "Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the Axios library's XSRF token protection logic uses JavaScript truthy/falsy semantics instead of strict boolean comparison for the withXSRFToken config property. When this property is set to any truthy non-boolean value (via prototype pollution or misconfiguration), the same-origin check (isURLSameOrigin) is short-circuited, causing XSRF tokens to be sent to all request targets including cross-origin servers controlled by an attacker. This vulnerability is fixed in 1.15.1 and 0.31.1.",
    "published": "2026-04-24T18:03:29.924Z",
    "modified": "2026-04-24T18:03:29.924Z",
    "type": "cve",
    "title": "Axios: XSRF Token Cross-Origin Leakage via Prototype Pollution Gadget in `withXSRFToken` Boolean Coercion",
    "source": "GitHub_M",
    "references": "https://github.com/axios/axios/security/advisories/GHSA-xx6v-rp6x-q39c",
    "id": "CVE-2026-42042",
    "bulletinFamily": "",
    "cwe": [
        "CWE-183",
        "CWE-201"
    ],
    "cvelist": null,
    "sourceData": "axios axios >= 1.0.0, < 1.15.1\naxios axios < 0.31.1",
    "sourceHref": "",
    "cvss": {
        "score": 5.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "axios",
    "version": ">= 1.0.0, < 1.15.1",
    "vendor": "axios",
    "ai_description": "",
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    "ai_score": 0
}