CVE-2026-63292

Name	CVE-2026-63292
Description	Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default. Users are recommended to upgrade to version 2.4.69, which fixes this issue.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-6569-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
apache2 (PTS)	bookworm	2.4.68-1~deb12u1	vulnerable
	bookworm (security)	2.4.67-1~deb12u3	vulnerable
	trixie	2.4.68-1~deb13u1	vulnerable
	trixie (security)	2.4.69-1~deb13u1	fixed
	forky, sid	2.4.69-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
apache2	source	trixie	2.4.69-1~deb13u1		DSA-6569-1
apache2	source	(unstable)	2.4.69-1

Notes

https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2026-63292
Fixed by: https://github.com/apache/httpd/commit/7ed3f91688b7a1e1ac48486fd2e5eeb2932e879f