{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-66565",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-12-04T16:05:22.975Z",
        "datePublished": "2025-12-09T01:47:58.430Z",
        "dateUpdated": "2025-12-09T16:03:03.356Z"
    },
    "containers": {
        "cna": {
            "title": "Fiber Utils UUIDv4 and UUID Silent Fallback to Predictable Values",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-252",
                            "lang": "en",
                            "description": "CWE-252: Unchecked Return Value",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-331",
                            "lang": "en",
                            "description": "CWE-331: Insufficient Entropy",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-338",
                            "lang": "en",
                            "description": "CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr"
                },
                {
                    "name": "https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47"
                }
            ],
            "affected": [
                {
                    "vendor": "gofiber",
                    "product": "utils",
                    "versions": [
                        {
                            "version": "github.com/gofiber/utils <= 1.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "github.com/gofiber/utils/v2 < 2.0.0-rc.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2025-12-09T01:47:58.430Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Fiber Utils is a collection of common functions created for Fiber. In versions 2.0.0-rc.3 and below, when the system's cryptographic random number generator (crypto/rand) fails, both functions silently fall back to returning predictable UUID values, including the zero UUID \"00000000-0000-0000-0000-000000000000\". The vulnerability occurs through two related but distinct failure paths, both ultimately caused by crypto/rand.Read() failures, compromising the security of all Fiber applications using these functions for security-critical operations. This issue is fixed in version 2.0.0-rc.4."
                }
            ],
            "source": {
                "advisory": "GHSA-m98w-cqp3-qcqr",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-12-09T14:16:58.759199Z",
                                "id": "CVE-2025-66565",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-12-09T16:03:03.356Z"
                }
            }
        ]
    }
}