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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-44332

Fiber: Username Enumeration via Timing Oracle in BasicAuth Default Authorizer

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

gofiber fiber

  • < 3.3.0affected

References