🛡️ CVE-2025-66565
🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-252 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-252
Public Exploit ✅ No
Source NVD
Published 2025-12-08
Updated 2026-06-15
Modified 2025-12-15

Affected Packages

Software From version Fixed in
github.com/gofiber/utils — —
github.com/gofiber/utils/v2 — —
utils — —

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