What is CVE-2026-93546?

CVE-2026-93546 is a high-severity vulnerability in Apache Software Foundation HTTP Server, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2026-10-01.

How severe is CVE-2026-93546?

High severity. CVSS v3 base score is 8.8 out of 10.

Integer overflow in Apache Software Foundation HTTP Server

CVE-2026-93546

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.

Vulnerability class: Integer Overflow

Published 2026-10-01 · last modified 2026-10-01.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apache Software Foundation HTTP Server

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

httpd.apache.org/security/vulnerabilities_24.html (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-93546?: CVE-2026-93546 is a high-severity vulnerability in Apache Software Foundation HTTP Server, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2026-10-01.
How severe is CVE-2026-93546?: High severity. CVSS v3 base score is 8.8 out of 10.