{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-47737",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-19T22:16:39.503Z",
        "datePublished": "2026-07-14T19:45:16.648Z",
        "dateUpdated": "2026-07-15T14:10:20.444Z"
    },
    "containers": {
        "cna": {
            "title": "Puma PROXY Protocol v1 Accepts Repeated Protocol Headers on Persistent Connections",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-290",
                            "lang": "en",
                            "description": "CWE-290: Authentication Bypass by Spoofing",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-345",
                            "lang": "en",
                            "description": "CWE-345: Insufficient Verification of Data Authenticity",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/puma/puma/security/advisories/GHSA-2vqw-3mp8-cgmx",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/puma/puma/security/advisories/GHSA-2vqw-3mp8-cgmx"
                },
                {
                    "name": "https://github.com/puma/puma/pull/3944",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/puma/puma/pull/3944"
                },
                {
                    "name": "https://github.com/puma/puma/pull/3947",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/puma/puma/pull/3947"
                },
                {
                    "name": "https://github.com/puma/puma/commit/439c6136d9c2275721b7864db3ee78af7c80889f",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/puma/puma/commit/439c6136d9c2275721b7864db3ee78af7c80889f"
                },
                {
                    "name": "https://github.com/puma/puma/commit/ebe9db3929ab8299d19c8f5b41e8ef4f4b22fa58",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/puma/puma/commit/ebe9db3929ab8299d19c8f5b41e8ef4f4b22fa58"
                },
                {
                    "name": "https://github.com/puma/puma/releases/tag/v7.2.1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/puma/puma/releases/tag/v7.2.1"
                },
                {
                    "name": "https://github.com/puma/puma/releases/tag/v8.0.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/puma/puma/releases/tag/v8.0.2"
                }
            ],
            "affected": [
                {
                    "vendor": "puma",
                    "product": "puma",
                    "versions": [
                        {
                            "version": ">= 5.5.0, < 7.2.1",
                            "status": "affected"
                        },
                        {
                            "version": ">= 8.0.0, < 8.0.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-14T19:45:16.648Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when set_remote_address proxy_protocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive request on the same connection, allowing an attacker to inject a second PROXY header and overwrite REMOTE_ADDR. This issue is fixed in versions 7.2.1 and 8.0.2."
                }
            ],
            "source": {
                "advisory": "GHSA-2vqw-3mp8-cgmx",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-15T14:10:11.985537Z",
                                "id": "CVE-2026-47737",
                                "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": "2026-07-15T14:10:20.444Z"
                }
            }
        ]
    }
}