USN-8384-1: Apache HTTP Server vulnerability

Publication date

4 June 2026

Overview

Apache HTTP Server could be made to consume excessive resources if it received specially crafted network traffic.


Packages

Details

It was discovered that Apache HTTP Server incorrectly handled certain
cookie headers in the HTTP/2 implementation. A remote attacker could
possibly use this issue to cause Apache HTTP Server to consume excessive
resources, resulting in a denial of service.

It was discovered that Apache HTTP Server incorrectly handled certain
cookie headers in the HTTP/2 implementation. A remote attacker could
possibly use this issue to cause Apache HTTP Server to consume excessive
resources, resulting in a denial of service.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.04 LTS resolute apache2 –  2.4.66-2ubuntu2.2
25.10 questing apache2 –  2.4.64-1ubuntu3.5
24.04 LTS noble apache2 –  2.4.58-1ubuntu8.13
22.04 LTS jammy apache2 –  2.4.52-1ubuntu4.21

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