CVE-2026-44332
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductFiber
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-203CWE-203
How to fix
Update
- gofiber fiber3.3.0 or later
- github.com/gofiber/fiber/v33.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gofiber fiber | v < 3.3.0 | 3.3.0 |
| github.com/gofiber/fiber/v3Go | v < 3.3.0 | 3.3.0 |
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