CVE-2026-44332 Fiber: Username Enumeration via Timing Oracle in BasicAuth Default Authorizer

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...

GHSA-G5VH-55HW-RXM8 GoFiber Vulnerable to Username Enumeration via Timing Oracle in BasicAuth Default Authorizer

Summary The default Authorizer function in GoFiber's BasicAuth middleware uses short-circuit evaluation that skips password hash comparison for non-existent usernames. With bcrypt-hashed passwords the primary use case, the timing difference between a valid and invalid username is approximately...

GoFiber Vulnerable to Username Enumeration via Timing Oracle in BasicAuth Default Authorizer

Summary The default Authorizer function in GoFiber's BasicAuth middleware uses short-circuit evaluation that skips password hash comparison for non-existent usernames. With bcrypt-hashed passwords the primary use case, the timing difference between a valid and invalid username is approximately...