CVE catalog

CVE-2026-87975

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Published: Oct 6, 2026, 2:17:47 PM UTC
Updated: Oct 6, 2026, 2:17:47 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.23% · Oct 27, 2026

An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. `django.forms.models.BaseModelFormSet.save_existing_objects()` used the presence of a primary key on a submitted form's instance as evidence that the instance belonged to the formset's limiting queryset. An object outside that queryset is represented by a newly constructed instance whose primary key can still be populated from submitted data when the model's primary key is a field accepted by the form, such as a `OneToOneField` or parent link used as the primary key of an inline formset's model, or a natural or UUID primary key included in the form's fields. This allows an authenticated user permitted to submit such a formset to delete rows outside the limiting queryset, without any permission on the targeted object, via forged management-form data marking an out-of-queryset object for deletion. Models using the default AutoField primary key are not affected. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Seonggwon Yoon for reporting this issue.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	python-django	sid	`3:5.2.18-2`	fixed
Debian	python-django	forky	`3:5.2.17-2`	vulnerable
Debian	python-django	trixie	`3:4.2.28-0+deb13u2`	vulnerable
Debian	python-django	trixie-security	`3:4.2.28-0+deb13u1`	vulnerable
Debian	python-django	bookworm	`3:3.2.25-0+deb12u3`	vulnerable
Debian	python-django	bookworm-security	`3:3.2.25-0+deb12u6`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	python-django	source	sid	`3:5.2.18-1`	not yet assigned	Not reported	[1150176]
Debian	python-django	source	forky	`(unfixed)`	not yet assigned	Not reported	[1150176]
Debian	python-django	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1150176]
Debian	python-django	source	bookworm	`3:3.2.25-0+deb12u6`	not yet assigned	Not reported	[1150176]

[Debian bug #1150176]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-django]Affected
Source package: [python-django]
Details (6)
- 3:3.2.25-0+deb12u3 · all · bookworm
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:3.2.25-0+deb12u3 · all · bookworm
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:4.2.21-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:4.2.21-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:3.2.25-0+deb12u4 · all · bookworm-security
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:3.2.25-0+deb12u4 · all · bookworm-security
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
[python-django-doc]Affected
Source package: [python-django]
Details (6)
- 3:3.2.25-0+deb12u3 · all · bookworm
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:3.2.25-0+deb12u3 · all · bookworm
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:4.2.21-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:4.2.21-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:3.2.25-0+deb12u4 · all · bookworm-security
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
- 3:3.2.25-0+deb12u4 · all · bookworm-security
  Affected · Fixed: 3:3.2.25-0+deb12u6
  nvd · python-django · debian · bookworm; nvd · python-django · debian · 12

[Debian 13 (Trixie)]

[python3-django]Affected
Source package: [python-django]
Details (6)
- 3:4.2.28-0+deb13u2 · all · trixie
  Affected
  nvd · python-django · debian · 13
- 3:4.2.28-0+deb13u2 · all · trixie
  Affected
  nvd · python-django · debian · 13
- 3:5.2.16-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · python-django · debian · 13
- 3:5.2.16-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · python-django · debian · 13
- 3:4.2.28-0+deb13u1 · all · trixie-security
  Affected
  nvd · python-django · debian · 13
- 3:4.2.28-0+deb13u1 · all · trixie-security
  Affected
  nvd · python-django · debian · 13
[python-django-doc]Affected
Source package: [python-django]
Details (6)
- 3:4.2.28-0+deb13u2 · all · trixie
  Affected
  nvd · python-django · debian · 13
- 3:4.2.28-0+deb13u2 · all · trixie
  Affected
  nvd · python-django · debian · 13
- 3:5.2.16-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · python-django · debian · 13
- 3:5.2.16-1~bpo13+1 · all · trixie-backports
  Affected
  nvd · python-django · debian · 13
- 3:4.2.28-0+deb13u1 · all · trixie-security
  Affected
  nvd · python-django · debian · 13
- 3:4.2.28-0+deb13u1 · all · trixie-security
  Affected
  nvd · python-django · debian · 13

Observed: Oct 27, 2026, 4:46:56 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]