CVE-2026-53624: Gofiber Fiber

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

Fiber is an Express inspired web framework written in Go. Prior to 3.4.0, the helmet middleware in middleware/helmet/helmet.go never sets the Strict-Transport-Security response header even when HSTSMaxAge is configured because it checks c.Protocol() for https instead of c.Scheme(). This issue is fixed in version 3.4.0.

Affected products

• Gofiber Fiber: before 3.4.0 (fixed in 3.4.0)

Published 2026-07-08. Last modified 2026-07-15.