CVE-2026-25882 MEDIUM

CVE-2026-25882: Fiber has a Denial of Service Vulnerability via Route Parameter Overflow

Vendor Gofiber
Product fiber
Weakness CWE-129
Published February 24, 2026
Last update February 24, 2026

CVSS base score

5.5/10
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:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

Fiber is an Express inspired web framework written in Go. A denial of service vulnerability exists in Fiber v2 and v3 that allows remote attackers to crash the application by sending requests to routes with more than 30 parameters. The vulnerability results from missing validation during route registration combined with an unbounded array write during request matching. Version 2.52.12 patches the issue in the v2 branch and 3.1.0 patches the issue in the v3 branch.

Key dates

02Disclosure timeline

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