CVE-2025-66565

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published12/9/2025

Last Modified12/11/2025

Sourcenvd

Honeypot Sightings0

Affected Products

gofiber:utils

Weaknesses (CWE)

CWE-252CWE-331CWE-338CWE-252CWE-338

References

https://github.com/gofiber/utils/commit/6c6cf047032b9c8dff43d29f990b4b10e9b02d47(security-advisories@github.com)

https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr(security-advisories@github.com)

https://github.com/gofiber/utils/security/advisories/GHSA-m98w-cqp3-qcqr(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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