---
id: "CVE-2026-114458"
kind: "vulnerability"
aliases: ["CVE-2026-114458"]
title: "mod_qos: unauthenticated remote attacker crashes Apache web server process"
severity: "medium"
cvss: 5.9
epss: 0.0031
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["apache", "mod_qos", "runtime", "self-hosted"]
not_affected_if: ["default-config"]
published_at: "2026-10-22T07:16:42+00:00"
first_seen_at: "2026-10-23T21:57:30+00:00"
updated_at: "2026-10-25T04:08:00+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114458", "first_seen_at": "2026-10-23T21:57:30+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114458", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# mod_qos: unauthenticated remote attacker crashes Apache web server process

mod_qos, an Apache HTTP Server module for connection control, fails to check array bounds when recording client IP addresses under connection rate monitoring. An unauthenticated attacker holding many low-rate connections corrupts heap memory and crashes the web server process.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114458
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114458

## From the sources

A flaw was found in mod_qos. An unauthenticated remote attacker can cause a Denial of Service (DoS) by maintaining numerous concurrent low-rate connections to a target server. When connection rate monitoring is active, the module fails to verify array boundaries when recording client IP addresses, allowing more connection records to be added than the allocated buffer can hold. This issue leads to heap memory corruption, which can crash the web server process.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_