{"id":"CVE-2025-66565","revision":"a0724da8cd1f4be78140ae8d99e45ab7","records":[{"revision":"a0724da8cd1f4be78140ae8d99e45ab7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-66565","aliases":[],"title":"Fiber Utils UUIDv4 and UUID Silent Fallback to Predictable Values","description":"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.","state":0,"publishedAt":"2025-12-09T01:47:58.43+00:00","modifiedAt":"2025-12-09T16:03:03.356+00:00","affected":[{"ecosystem":"Vendor product","name":"utils","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"gofiber\",\n                    \"product\": \"utils\",\n                    \"versions\": [\n                        {\n                            \"version\": \"github.com/gofiber/utils <= 1.2.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"github.com/gofiber/utils/v2 < 2.0.0-rc.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":9.3,"severity":"CRITICAL"}],"references":["https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr","https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-66565","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-66565","identifiers":["CVE-2025-66565"]},"retained":false,"historicalAffected":[]}],"coverage":[]}