---
title: "CVE-2026-93546: Apache HTTP Server - Integer Overflow"
description: "Apache HTTP Server <= 2.4.68 contains an integer overflow in mod_dav_fs caused by PROPPATCH requests with many XML namespaces, letting authenticated WebDAV clients with write access crash worker processes and corrupt property databases."
url: https://panop.io/threat-heartbeat/CVE-2026-93546/
---

# CVE-2026-93546 Apache HTTP Server - Integer Overflow

Apache HTTP Server <= 2.4.68 contains an integer overflow in mod\_dav\_fs caused by PROPPATCH requests with many XML namespaces, letting authenticated WebDAV clients with write access crash worker processes and corrupt property databases.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.44% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93546)

## Details

Type

Integer Overflow

Impact

Denial Of Service, Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

1 October 2026

Updated

15 October 2026

Weakness

[CWE-190](https://cwe.mitre.org/data/definitions/190.html)

## Vendor fix

Update to a version later than 2.4.68 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93546](https://nvd.nist.gov/vuln/detail/CVE-2026-93546)
- [https://httpd.apache.org/security/vulnerabilities\_24.html](https://httpd.apache.org/security/vulnerabilities_24.html)
- [http://www.openwall.com/lists/oss-security/2026/10/01/30](http://www.openwall.com/lists/oss-security/2026/10/01/30)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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