NULL Pointer Dereference in Apache HTTP Server Affects Unauthenticated Remote Users
CVE-2026-33007

5.3MEDIUM

Key Information:

Vendor

Apache
Status
Apache Http Server
Vendor
CVE Published:
4 May 2026

What is CVE-2026-33007?

A NULL pointer dereference vulnerability in the mod_authn_socache module of Apache HTTP Server versions 2.4.66 and earlier enables an unauthenticated remote user to crash a child process in a caching forward proxy environment. This issue can cause service disruptions, and users are strongly advised to upgrade to version 2.4.67 or later to mitigate this risk.

Affected Version(s)

Apache HTTP Server 2.4.0 <= 2.4.66

References

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

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Pavel Kohout, Aisle Research, Aisle.com
.