---
id: CVE-2026-63292
title: >-
  Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation
  Apache HTTP Server through 2.4.68 on all platforms allows a remote client to
  cause a denial of service or potentially execute arbitrary code via an HTTP
  request…
summary: >-
  Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation
  Apache HTTP Server through 2.4.68 on all platforms allows a remote client to
  cause a denial of service or potentially execute arbitrary code via an HTTP
  request…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-121
  - CWE-787
vendor: apache
product: http_server
affected:
  - 'http_server >= 2.4.0, < 2.4.69'
patched:
  - http_server 2.4.69
published: '2026-10-01'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T17:47:01.560'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63292'
references:
  - url: 'https://httpd.apache.org/security/vulnerabilities_24.html'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/01/24'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63292.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-63292'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2544832'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-63292'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63292'
  - url: 'https://access.redhat.com/errata/RHSA-2026:74858'
tags:
  - nvd
  - exploit-available
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00948
epssPercentile: 0.60993
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/0xBlackash/CVE-2026-63292'
  checkedAt: '2026-10-27T19:06:41.947Z'
exploitAvailable: true
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-01T18:19:50.244775Z'
scores:
  nvd: 7.5
  vendor: 8.1
ingestedAt: '2026-10-01T18:55:42.364Z'
---

## Overview

Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default.

Users are recommended to upgrade to version 2.4.69, which fixes this issue.

## Affected

- `http_server >= 2.4.0, < 2.4.69`

## Remediation

Upgrade past the affected range:

- `http_server 2.4.69`

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63292.json)
- **RHSA-2026:74858** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:74858)