CVE-2025-66565

Name of the Vulnerable Software and Affected Versions Fiber Utils versions 2.0.0-rc.3 and below

Description Fiber Utils is a collection of functions for Fiber. In versions 2.0.0-rc.3 and below, if the system’s cryptographic random number generator (crypto/rand) fails, the software silently reverts to generating predictable UUID values, including the zero UUID "00000000-0000-0000-0000-000000000000". This occurs due to failures in the crypto/rand.Read() function, potentially compromising the security of Fiber applications using these functions for security-critical operations.

Recommendations Update to version 2.0.0-rc.4 or later.