Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gofiber | Utils | <= 1.2.0 |
Related Weaknesses (CWE)
References
- https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47Patch
- https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqrVendor Advisory
- https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqrVendor Advisory
FAQ
What is CVE-2025-66565?
CVE-2025-66565 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 silentl...
How severe is CVE-2025-66565?
CVE-2025-66565 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-66565?
Check the references section above for vendor advisories and patch information. Affected products include: Gofiber Utils.