Vulnerability Description
Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username enumeration through response timing differences. This issue is fixed in version 3.3.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gofiber | Fiber | < 3.3.0 |
Related Weaknesses (CWE)
References
- https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059ePatch
- https://github.com/gofiber/fiber/pull/4245Issue TrackingPatch
- https://github.com/gofiber/fiber/releases/tag/v3.3.0Release Notes
- https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8ExploitVendor Advisory
FAQ
What is CVE-2026-44332?
CVE-2026-44332 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation th...
How severe is CVE-2026-44332?
CVE-2026-44332 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44332?
Check the references section above for vendor advisories and patch information. Affected products include: Gofiber Fiber.