References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

Known Affected Software Configurations Switch to CPE 2.2

Change History

OR
          *cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.67

Apache Software Foundation: https://httpd.apache.org/security/vulnerabilities_24.html Types: Vendor Advisory

CVE: http://www.openwall.com/lists/oss-security/2026/05/04/20 Types: Mailing List, Third Party Advisory

http://www.openwall.com/lists/oss-security/2026/05/04/20

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

A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.

The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.

Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.

CWE-476

https://httpd.apache.org/security/vulnerabilities_24.html