{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-75514",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-08-17T20:49:21.599Z",
        "datePublished": "2026-08-20T18:31:51.527Z",
        "dateUpdated": "2026-08-20T19:00:33.894Z"
    },
    "containers": {
        "cna": {
            "title": "BunkerWeb: rDNS bypass via missing forward-confirmation (FCrDNS) in blacklist, greylist, and antibot",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-350",
                            "lang": "en",
                            "description": "CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.9,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjm",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjm"
                },
                {
                    "name": "https://github.com/bunkerity/bunkerweb/pull/3710",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bunkerity/bunkerweb/pull/3710"
                },
                {
                    "name": "https://github.com/bunkerity/bunkerweb/commit/1a97e5b3f977130a1b84507a9e1f703c8eec12eb",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bunkerity/bunkerweb/commit/1a97e5b3f977130a1b84507a9e1f703c8eec12eb"
                },
                {
                    "name": "https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.13",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bunkerity/bunkerweb/releases/tag/v1.6.13"
                }
            ],
            "affected": [
                {
                    "vendor": "bunkerity",
                    "product": "bunkerweb",
                    "versions": [
                        {
                            "version": "< 1.6.13",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-20T18:31:51.527Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "BunkerWeb is an open-source, next-generation Web Application Firewall. Prior to 1.6.13, the blacklist, greylist, and antibot modules in src/common/core/blacklist/blacklist.lua, src/common/core/greylist/greylist.lua, and src/common/core/antibot/antibot.lua trust PTR suffix matches in IGNORE_RDNS, GREYLIST_RDNS, and ANTIBOT_IGNORE_RDNS without using get_ips to confirm that the hostname resolves to the client address. An unauthenticated remote attacker who controls a PTR record can spoof a trusted suffix to bypass rDNS-based blacklisting, gain greylist treatment, or skip an antibot challenge. This issue is fixed in version 1.6.13."
                }
            ],
            "source": {
                "advisory": "GHSA-q54j-5484-pvjm",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/bunkerity/bunkerweb/security/advisories/GHSA-q54j-5484-pvjm",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-20T18:58:07.780705Z",
                                "id": "CVE-2026-75514",
                                "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": "2026-08-20T19:00:33.894Z"
                }
            }
        ]
    }
}