CVE-2026-45045 | gofiber Fiber up to 2.52.13/3.2.x Proxy Helper proxy.go Header.Add/Header.Set X-Real-IP access control

A vulnerability marked as problematic has been reported in gofiber Fiber up to 2.52.13/3.2.x. This affects the function Header.Add/Header.Set of the file middleware/proxy/proxy.go of the component Proxy Helper. The manipulation of the argument X-Real-IP leads to improper access controls.

This vulnerability is documented as CVE-2026-45045. The attack can be initiated remotely. There is not any exploit available.