Angular HTTP Client Has XSRF Token Leakage via Protocol-Relative URLs_CVE-2025-66035

{
    "lastseen": "",
    "description": "Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.",
    "published": "2025-11-26T22:18:35.692Z",
    "modified": "2025-11-26T22:18:35.692Z",
    "type": "cve",
    "title": "Angular HTTP Client Has XSRF Token Leakage via Protocol-Relative URLs",
    "source": "GitHub_M",
    "references": "https://github.com/angular/angular/security/advisories/GHSA-58c5-g7wp-6w37\nhttps://github.com/angular/angular/commit/0276479e7d0e280e0f8d26fa567d3b7aa97a516f\nhttps://github.com/angular/angular/commit/05fe6686a97fa0bcd3cf157805b3612033f975bc\nhttps://github.com/angular/angular/commit/3240d856d942727372a705252f7c8c115394a41e\nhttps://github.com/angular/angular/releases/tag/19.2.16\nhttps://github.com/angular/angular/releases/tag/20.3.14\nhttps://github.com/angular/angular/releases/tag/21.0.1",
    "id": "CVE-2025-66035",
    "bulletinFamily": "",
    "cwe": [
        "CWE-201",
        "CWE-359"
    ],
    "cvelist": null,
    "sourceData": "angular angular >= 21.0.0-next.0, < 21.0.1\nangular angular >= 20.0.0-next.0, < 20.3.14\nangular angular < 19.2.16",
    "sourceHref": "",
    "cvss": {
        "score": 7.7,
        "severity": "HIGH",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
        "version": "4.0"
    },
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "angular",
    "version": ">= 21.0.0-next.0, < 21.0.1",
    "vendor": "angular",
    "ai_description": "",
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    "ai_score": 0
}