What is CVE-2026-42528?

CVE-2026-42528 is a medium-severity vulnerability in Apache Software Foundation HTTP Server, classified under CWE-789. CVSS score: 4.3/10. Published 2026-10-01.

How severe is CVE-2026-42528?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Apache Software Foundation HTTP Server

CVE-2026-42528

A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes. Users are recommended to upgrade to version 2.4.69, which fixes this issue

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

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

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-789

References

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

Frequently asked questions

What is CVE-2026-42528?: CVE-2026-42528 is a medium-severity vulnerability in Apache Software Foundation HTTP Server, classified under CWE-789. CVSS score: 4.3/10. Published 2026-10-01.
How severe is CVE-2026-42528?: Medium severity. CVSS v3 base score is 4.3 out of 10.