{"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"}}]}}