Vulnerability Instance

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{
    "url": "http://public2.vulnerablecode.io/api/vulnerabilities/310889?format=api",
    "vulnerability_id": "VCID-ew7v-cp7g-ebgk",
    "summary": "lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks.\n\nSuccessful exploitation may allow an attacker to:\n\n  *  Bypass access control rules\n  *  Inject unsafe input into backend logic that trusts request headers\n  *  Execute HTTP Request Smuggling attacks under some conditions\n\n\nThis issue affects lighttpd1.4.80",
    "aliases": [
        {
            "alias": "CVE-2025-12642"
        }
    ],
    "fixed_packages": [
        {
            "url": "http://public2.vulnerablecode.io/api/packages/929467?format=api",
            "purl": "pkg:deb/debian/lighttpd@0?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/lighttpd@0%3Fdistro=trixie"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/929451?format=api",
            "purl": "pkg:deb/debian/lighttpd@1.4.59-1%2Bdeb11u2?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/lighttpd@1.4.59-1%252Bdeb11u2%3Fdistro=trixie"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/929449?format=api",
            "purl": "pkg:deb/debian/lighttpd@1.4.69-1?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/lighttpd@1.4.69-1%3Fdistro=trixie"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/929453?format=api",
            "purl": "pkg:deb/debian/lighttpd@1.4.79-2?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/lighttpd@1.4.79-2%3Fdistro=trixie"
        },
        {
            "url": "http://public2.vulnerablecode.io/api/packages/929452?format=api",
            "purl": "pkg:deb/debian/lighttpd@1.4.82-2?distro=trixie",
            "is_vulnerable": false,
            "affected_by_vulnerabilities": [],
            "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/lighttpd@1.4.82-2%3Fdistro=trixie"
        }
    ],
    "affected_packages": [],
    "references": [
        {
            "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2025-12642",
            "reference_id": "",
            "reference_type": "",
            "scores": [
                {
                    "value": "0.00045",
                    "scoring_system": "epss",
                    "scoring_elements": "0.13758",
                    "published_at": "2026-04-02T12:55:00Z"
                },
                {
                    "value": "0.00054",
                    "scoring_system": "epss",
                    "scoring_elements": "0.17063",
                    "published_at": "2026-04-08T12:55:00Z"
                },
                {
                    "value": "0.00054",
                    "scoring_system": "epss",
                    "scoring_elements": "0.17119",
                    "published_at": "2026-04-09T12:55:00Z"
                },
                {
                    "value": "0.00054",
                    "scoring_system": "epss",
                    "scoring_elements": "0.17095",
                    "published_at": "2026-04-11T12:55:00Z"
                },
                {
                    "value": "0.00054",
                    "scoring_system": "epss",
                    "scoring_elements": "0.17049",
                    "published_at": "2026-04-12T12:55:00Z"
                },
                {
                    "value": "0.00054",
                    "scoring_system": "epss",
                    "scoring_elements": "0.17195",
                    "published_at": "2026-04-04T12:55:00Z"
                },
                {
                    "value": "0.00054",
                    "scoring_system": "epss",
                    "scoring_elements": "0.16973",
                    "published_at": "2026-04-07T12:55:00Z"
                },
                {
                    "value": "0.00064",
                    "scoring_system": "epss",
                    "scoring_elements": "0.19985",
                    "published_at": "2026-04-13T12:55:00Z"
                }
            ],
            "url": "https://api.first.org/data/v1/epss?cve=CVE-2025-12642"
        },
        {
            "reference_url": "https://github.com/lighttpd/lighttpd1.4/commit/35cb89c103877de62d6b63d0804255475d77e5e1",
            "reference_id": "35cb89c103877de62d6b63d0804255475d77e5e1",
            "reference_type": "",
            "scores": [
                {
                    "value": "6.9",
                    "scoring_system": "cvssv4",
                    "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"
                },
                {
                    "value": "Track",
                    "scoring_system": "ssvc",
                    "scoring_elements": "SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-11-03T19:43:55Z/"
                }
            ],
            "url": "https://github.com/lighttpd/lighttpd1.4/commit/35cb89c103877de62d6b63d0804255475d77e5e1"
        }
    ],
    "weaknesses": [
        {
            "cwe_id": 444,
            "name": "Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
            "description": "The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination."
        }
    ],
    "exploits": [],
    "severity_range_score": "6.9 - 6.9",
    "exploitability": null,
    "weighted_severity": null,
    "risk_score": null,
    "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-ew7v-cp7g-ebgk"
}