CVE-2026-93546

Apache HTTP Server: mod_dav_fs namespace overflow

State: Published
Severity: 8.8 High
Published: Oct 1, 2026
Updated: Oct 1, 2026
Reserved: Sep 18, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-190 Integer overflow or wraparound

Affected Products

Product	Versions
Apache HTTP ServerApache Software Foundation	2.4.68 and earlierAffected

References

https://httpd.apache.org/security/vulnerabilities_24.htmlvendor-advisory
http://www.openwall.com/lists/oss-security/2026/10/01/30

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