CVE-2025-66565 (GCVE-0-2025-66565)
Vulnerability from cvelistv5
Published
2025-12-09 01:47
Modified
2025-12-09 16:03
Severity ?
9.3 (Critical) - 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
CWE
  • CWE-252 - Unchecked Return Value
  • CWE-331 - Insufficient Entropy
  • CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Summary
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.
References
Impacted products
Vendor Product Version
gofiber utils Version: github.com/gofiber/utils <= 1.2.0
Version: github.com/gofiber/utils/v2 < 2.0.0-rc.4
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