CVE-2026-33007: Apache HTTP Server: mod_authn_socache crash

[Eric Covener <covener () apache org>]

Severity: low 

Affected versions:

- Apache HTTP Server 2.4.0 through 2.4.66

Description:

A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated 
remote user to crash a child process in a caching forward proxy configuration.

Users are recommended to upgrade to version 2.4.67, which fixes this issue.

Credit:

Pavel Kohout, Aisle Research, Aisle.com (finder)

References:

https://httpd.apache.org/security/vulnerabilities_24.html
https://httpd.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-33007

Timeline:

2026-03-04: Report received
2026-05-04: 2.4.67 released
2026-05-04: fixed in 2.4.x by r1933358