{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-59903",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-07T16:40:07.984Z",
        "datePublished": "2026-08-17T17:56:28.726Z",
        "dateUpdated": "2026-08-17T18:14:01.121Z"
    },
    "containers": {
        "cna": {
            "title": "Netty: Cache Poisoning and Information Disclosure via CORS Vary Header Overwrite",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-524",
                            "lang": "en",
                            "description": "CWE-524: Use of Cache Containing Sensitive Information",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/netty/netty/security/advisories/GHSA-8c42-7qj2-3j46",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/netty/netty/security/advisories/GHSA-8c42-7qj2-3j46"
                },
                {
                    "name": "https://github.com/netty/netty/pull/17213",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/netty/netty/pull/17213"
                },
                {
                    "name": "https://github.com/netty/netty/pull/17217",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/netty/netty/pull/17217"
                },
                {
                    "name": "https://github.com/netty/netty/releases/tag/netty-4.1.137.Final",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/netty/netty/releases/tag/netty-4.1.137.Final"
                },
                {
                    "name": "https://github.com/netty/netty/releases/tag/netty-4.2.17.Final",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/netty/netty/releases/tag/netty-4.2.17.Final"
                }
            ],
            "affected": [
                {
                    "vendor": "netty",
                    "product": "netty",
                    "versions": [
                        {
                            "version": "< 4.1.137.Final",
                            "status": "affected"
                        },
                        {
                            "version": ">= 4.2.0.Final, < 4.2.17.Final",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-17T17:56:28.726Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final."
                }
            ],
            "source": {
                "advisory": "GHSA-8c42-7qj2-3j46",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-17T18:13:26.781284Z",
                                "id": "CVE-2026-59903",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "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": "2026-08-17T18:14:01.121Z"
                }
            }
        ]
    }
}