CVE-2026-63686

Name	CVE-2026-63686
Description	A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails. 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)

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)	2.4.67-1~deb13u3	vulnerable
	forky	2.4.68-2	vulnerable
	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	(unstable)	2.4.69-1

Notes

https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2026-63686
Fixed by: https://github.com/apache/httpd/commit/6fa059e4a270e0a66dd398e96875df86abff3a75