Disclosure 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.
Source-reported weakness categories
CWE-252, CWE-331, CWE-338
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-66565
Open original source · Updated Oct 07, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| gofiber | utils | * {"versionEndIncluding":"1.2.0"} |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
| gofiber | utils | 2.0.0 |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- github.com — Vendor Advisory
- github.com — Vendor Advisory
PUBLISHED 2025-12-09T11:18:21-05:00
MODIFIED 2026-10-07T16:10:01-04:00
INGESTED 2026-10-08T12:35:36-04:00