{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-40562",
        "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "state": "PUBLISHED",
        "assignerShortName": "CPANSec",
        "dateReserved": "2026-04-14T11:35:53.644Z",
        "datePublished": "2026-05-06T12:36:34.715Z",
        "dateUpdated": "2026-05-07T16:13:49.501Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://cpan.org/modules",
                    "defaultStatus": "unaffected",
                    "packageName": "Gazelle",
                    "product": "Gazelle",
                    "programFiles": [
                        "lib/Plack/Handler/Gazelle.pm",
                        "lib/Plack/Handler/Gazelle.xs"
                    ],
                    "programRoutines": [
                        {
                            "name": "Plack::Handler::Gazelle::run"
                        },
                        {
                            "name": "lib/Plack/Handler/Gazelle.xs::_parse_http_request"
                        }
                    ],
                    "repo": "https://github.com/kazeburo/Gazelle",
                    "vendor": "KAZEBURO",
                    "versions": [
                        {
                            "lessThanOrEqual": "0.49",
                            "status": "affected",
                            "version": "0",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "CPANSec"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence.\n\nGazelle incorrectly prioritizes \"Content-Length\" over \"Transfer-Encoding: chunked\" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence.\n\nAn attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-33",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-33 HTTP Request Smuggling"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-444",
                            "description": "CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
                "shortName": "CPANSec",
                "dateUpdated": "2026-05-07T16:13:49.501Z"
            },
            "references": [
                {
                    "url": "https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://security.metacpan.org/patches/G/Gazelle/0.49/CVE-2026-40562-r1.patch"
                },
                {
                    "tags": [
                        "release-notes"
                    ],
                    "url": "https://metacpan.org/release/KAZEBURO/Gazelle-0.50/changes"
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to Gazelle 0.50 or later."
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "timeline": [
                {
                    "lang": "en",
                    "time": "2026-04-12T00:00:00.000Z",
                    "value": "Issue identified by CPANSec"
                },
                {
                    "lang": "en",
                    "time": "2026-04-29T00:00:00.000Z",
                    "value": "Issue reported to software maintainer"
                },
                {
                    "lang": "en",
                    "time": "2026-05-06T00:00:00.000Z",
                    "value": "Issue disclosed by CPANSec"
                },
                {
                    "lang": "en",
                    "time": "2026-05-07T00:00:00.000Z",
                    "value": "Gazelle 0.50 released"
                }
            ],
            "title": "Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence",
            "workarounds": [
                {
                    "lang": "en",
                    "value": "Migrate to Starman version 0.4018 or newer which has fixed the issue.  Or apply the patch."
                }
            ],
            "x_generator": {
                "engine": "cpansec-cna-tool 0.1"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.5,
                            "attackVector": "NETWORK",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "NONE",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "NONE"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-06T14:14:25.637199Z",
                                "id": "CVE-2026-40562",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-05-06T14:15:32.815Z"
                }
            },
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2026/05/06/7"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2026-05-06T16:32:45.619Z"
                }
            }
        ]
    }
}