CVE-2025-71031

Water-Melon Melon commit 9df9292 and below is vulnerable to Denial of Service

High · published February 4, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
43.5
In the wild
Unconfirmed
What it is

⚡ A rogue HTTP request can crash your server! The Water-Melon Melon library lacks a maximum header length, leaving it vulnerable to denial of service. 🍉 Think of it like a restaurant where there's no limit on how many special requests customers can make. One table could overload the kitchen, causing delays and chaos, while everyone else waits without their orders! An attacker could send massive request headers that consume all available RAM, leading to a complete server shutdown. This could render your application unavailable for legitimate users, causing frustration and potential revenue loss. It's a scenario that can spiral out of control quickly!

Put simply

Think of it like a restaurant where there's no limit on how many special requests customers can make. One table could overload the kitchen, causing delays and chaos, while everyone else waits without their orders! This vulnerability stems from the HTTP component in Water-Melon Melon, which doesn't enforce a maximum header length. An excessive header could easily consume memory resources, resulting in a denial of service.

What to do

An attacker could send massive request headers that consume all available RAM, leading to a complete server shutdown. This could render your application unavailable for legitimate users, causing frustration and potential revenue loss. It's a scenario that can spiral out of control quickly! To mitigate this issue, update to the latest version of Water-Melon Melon that addresses this vulnerability. Implement server-side restrictions on the maximum length of HTTP headers to prevent abuse. Regularly monitor your application for unusual traffic patterns that could indicate an attack. You’ve got this! Fix the issue, and your server will be back in fighting shape in no time! 🛡️

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00527 · 43.5th percentile
Published
2026-02-04T00:00Z
EPSS history
Timeline
  • 04 FEB 00:00Z
    Water-Melon Melon commit 9df9292 and below is vulnerable to Denial of Service
    cvelistv5