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.
History

Tue, 09 Dec 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 09 Dec 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Gofiber
Gofiber utils
Vendors & Products Gofiber
Gofiber utils

Tue, 09 Dec 2025 02:00:00 +0000

Type Values Removed Values Added
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.
Title Fiber Utils UUIDv4 and UUID Silent Fallback to Predictable Values
Weaknesses CWE-252
CWE-331
CWE-338
References
Metrics cvssV4_0

{'score': 9.3, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-12-09T01:47:58.430Z

Updated: 2025-12-09T16:03:03.356Z

Reserved: 2025-12-04T16:05:22.975Z

Link: CVE-2025-66565

cve-icon Vulnrichment

Updated: 2025-12-09T14:17:01.343Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-09T16:18:21.097

Modified: 2025-12-09T18:36:53.557

Link: CVE-2025-66565

cve-icon Redhat

No data.