Integer overflow in Apache HTTP Server - CVE-2026-93546
Published: October 1, 2026
Vulnerability identifier: #VU153109
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93546
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service and corrupt a directory's property database.
The vulnerability exists due to an integer overflow in mod_dav_fs when processing PROPPATCH requests declaring many XML namespaces. A remote user can send a crafted PROPPATCH request to cause a denial of service and corrupt a directory's property database.
Write access to WebDAV resources is required.
Affected software
Apache HTTP Server
How to mitigate CVE-2026-93546
Install security update from vendor's website.
Apache HTTP Server - update to 2.4.69