CVE-2026-53878

Name	CVE-2026-53878
Description	An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. `DomainNameValidator` does not prohibit newlines in domain names (unless used via a form field, since `CharField` strips newlines). If an application uses values with newlines in an HTTP response, header injection can occur. Django itself is unaffected because `HttpResponse` prohibits newlines in HTTP headers. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Bence Nagy for reporting 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)
Debian Bugs	1141629

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-django (PTS)	bullseye	2:2.2.28-1~deb11u2	vulnerable
	bullseye (security)	2:2.2.28-1~deb11u12	vulnerable
	bookworm, bookworm (security)	3:3.2.25-0+deb12u2	vulnerable
	trixie (security), trixie	3:4.2.28-0+deb13u1	vulnerable
	forky	3:5.2.15-2	vulnerable
	sid	3:5.2.16-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-django	source	(unstable)	3:5.2.16-1			1141629

Notes

https://www.djangoproject.com/weblog/2026/jul/07/security-releases/
Fixed by: https://github.com/django/django/commit/d5d60ed0323cddaa0ce0237a26a3d49ac21ee05e (5.2.16)