This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-73636 →
UBUNTU-CVE-2026-73636
Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the...
Original description
The description as published by the source.
Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:Pro:14.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu4.22+esm17"}]}]
Ubuntu:Pro:16.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.18-2ubuntu3.17+esm22"}]}]
Ubuntu:Pro:18.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.29-1ubuntu4.27+esm13"}]}]
Ubuntu:Pro:20.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.41-4ubuntu3.23+esm9"}]}]
Ubuntu:22.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.52-1ubuntu4.25"}]}]
Ubuntu:24.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.58-1ubuntu8.17"}]}]
Ubuntu:26.10
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.66-2ubuntu2.6"}]}]
References
- advisory ubuntu.com
- report ubuntu.com
- report cve.org
- report httpd.apache.org
- report httpd.apache.org
- report openwall.com