Vulnerability Database

313,825

Total vulnerabilities in the database

CVE-2025-66565

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.

  • Published: Dec 9, 2025
  • Updated: Dec 17, 2025
  • CVE: CVE-2025-66565
  • Severity: Critical
  • Exploit:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWEs:

Software From Fixed in
gofiber / utils - 1.2.0.x
gofiber / utils 2.0.0-beta1 2.0.0-beta1.x
gofiber / utils 2.0.0-beta10 2.0.0-beta10.x
gofiber / utils 2.0.0-beta11 2.0.0-beta11.x
gofiber / utils 2.0.0-beta12 2.0.0-beta12.x
gofiber / utils 2.0.0-beta13 2.0.0-beta13.x
gofiber / utils 2.0.0-beta14 2.0.0-beta14.x
gofiber / utils 2.0.0-beta2 2.0.0-beta2.x
gofiber / utils 2.0.0-beta3 2.0.0-beta3.x
gofiber / utils 2.0.0-beta4 2.0.0-beta4.x
gofiber / utils 2.0.0-beta5 2.0.0-beta5.x
gofiber / utils 2.0.0-beta6 2.0.0-beta6.x
gofiber / utils 2.0.0-beta7 2.0.0-beta7.x
gofiber / utils 2.0.0-beta8 2.0.0-beta8.x
gofiber / utils 2.0.0-beta9 2.0.0-beta9.x
gofiber / utils 2.0.0-rc1 2.0.0-rc1.x
gofiber / utils 2.0.0-rc2 2.0.0-rc2.x
gofiber / utils 2.0.0-rc3 2.0.0-rc3.x
gofiber / utils 2.0.0-rc4 2.0.0-rc4.x