CVE-2026-25882

MEDIUM EPSS 44.0%
Published Feb 24, 20264mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 4.0
Medium
Find Similar
Published Feb 24, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
—
Impact
—
Vector string
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
44.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-129

Affected Products 2

VendorProductVersionRange
gofiberfiber*≥2.0.0  –  <2.52.12
gofiberfiber*≥3.0.0  –  <3.1.0

References 4

  • github.com https://github.com/gofiber/fiber/blob/main/path.go#L514
    Product
  • github.com https://github.com/gofiber/fiber/blob/v2/path.go#L516
    Product
  • github.com https://github.com/gofiber/fiber/pull/3962
    Issue TrackingPatch
  • github.com https://github.com/gofiber/fiber/security/advisories/GHSA-mrq8-rjmw-wpq3
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/gofiber/fiber/pull/3962
    Issue TrackingPatch