CVE-2025-66630
9.4 · CRITICALOverview
CVE-2025-66630 is a critical-severity vulnerability affecting gofiber fiber. It was published on February 9, 2026 and has a CVSS 3.1 base score of 9.4 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.4, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Fiber is an Express inspired web framework written in Go. Before 2.52.11, on Go versions prior to 1.24, the underlying crypto/rand implementation can return an error if secure randomness cannot be obtained. Because no error is returned by the Fiber v2 UUID functions, application code may unknowingly rely on predictable, repeated, or low-entropy identifiers in security-critical pathways. This is especially impactful because many Fiber v2 middleware components (session middleware, CSRF, rate limiting, request-ID generation, etc.) default to using utils.UUIDv4(). This vulnerability is fixed in 2.52.11.
Remediation
Check the references section for vendor advisories and patches from gofiber. Update fiber to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| gofiber | fiber | >= 0, < 2.52.11 | Affected |
| golang | go | >= 0, < 1.24.0 | Affected |
Frequently Asked Questions
What is CVE-2025-66630?
CVE-2025-66630 is a critical-severity vulnerability affecting gofiber fiber. It was published on February 9, 2026 and has a CVSS 3.1 base score of 9.4 (CRITICAL).
How severe is CVE-2025-66630?
This vulnerability has a CVSS 3.1 base score of 9.4, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-66630?
Check the references section for vendor advisories and patches from gofiber. Update fiber to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-66630?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-66630 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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