CVE-2026-25891 HIGH

CVE-2026-25891: Fiber has an Arbitrary File Read in Static Middleware on Windows

Vendor Gofiber
Product fiber
Weakness CWE-22 · Path traversal
Published February 24, 2026
Last update February 24, 2026
View on NVD All CVEs

CVSS base score

7.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 24, 2026 CVE published
February 24, 2026 Record updated