---
id: CVE-2026-93546
title: >-
  Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an
  authenticated WebDAV client with write access to crash worker processes and
  persistently corrupt a directory's property database via PROPPATCH requests
  declari…
summary: >-
  Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an
  authenticated WebDAV client with write access to crash worker processes and
  persistently corrupt a directory's property database via PROPPATCH requests
  declari…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-190
vendor: apache
product: http_server
affected:
  - http_server < 2.4.69
patched:
  - http_server 2.4.69
published: '2026-10-01'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T16:05:53.007'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93546'
references:
  - url: 'https://httpd.apache.org/security/vulnerabilities_24.html'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/01/30'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93546.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93546'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2544798'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-93546'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93546'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00429
epssPercentile: 0.36974
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-01T19:38:29.562581Z'
scores:
  nvd: 8.8
  vendor: 5.4
ingestedAt: '2026-10-01T18:55:42.366Z'
---

## Overview

Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database via PROPPATCH requests declaring many XML namespaces.

## Affected

- `http_server < 2.4.69`

## Remediation

Upgrade past the affected range:

- `http_server 2.4.69`

## Vendor advisories

- **Red Hat VEX** · Moderate · 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 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-01 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93546.json)