Memory Calculation Bug in Apache Web Server Affecting mod_dav
CVE-2026-42528

4.3MEDIUM

Key Information:

Vendor

Apache
Status
Apache Http Server
Vendor
CVE Published:
1 October 2026

What is CVE-2026-42528?

A vulnerability exists in the mod_dav module of Apache Httpd versions 2.4.67 and earlier, which could be exploited by attackers to crash server child processes. This issue arises from improper handling of memory calculations when creating WebDAV locks. To mitigate potential risks, users are advised to upgrade to version 2.4.69, which addresses this vulnerability and enhances overall security.

Affected Version(s)

Apache HTTP Server 0 <= 2.4.68

References

https://httpd.apache.org/security/vulnerabilities_24.html
vendor-advisory

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zhenpeng (Leo) Lin at depthfirst
.