VDB
CISA-2025-66565
CISA-2025-66565
PUBLISHED
CVSS 9.3 CRITICAL
Reported by GitHub_M · Published December 9, 2025
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.
Risk Scores
CVSS 4.0
9.3
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| gofiber | utils | github.com/gofiber/utils <= 1.2.0, github.com/gofiber/utils/v2 < 2.0.0-rc.4 |
| gofiber | utils | github.com/gofiber/utils/v2 < 2.0.0-rc.4, *, github.com/gofiber/utils <= 1.2.0 |
Timeline
- Dec 9, 2025 CVE Published
- Dec 9, 2025 CVE Updated