CVE-2026-25891: Gofiber Fiber

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

Fiber is an Express inspired web framework written in Go. A Path Traversal (CWE-22) vulnerability in Fiber allows a remote attacker to bypass the static middleware sanitizer and read arbitrary files on the server file system on Windows. This affects Fiber v3 through version 3.0.0. This has been patched in Fiber v3 version 3.1.0.

Affected products

• Gofiber Fiber: from 3.0.0, before 3.1.0 (fixed in 3.1.0)

Published 2026-02-24. Last modified 2026-06-17.