CVE catalog

CVE-2026-84429

Severity: Medium · CVSS 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Oct 6, 2026, 2:17:46 PM UTC
Updated: Oct 6, 2026, 2:17:47 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.48% · Oct 25, 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.utils.http.parse_header_parameters()` was subject to a potential denial-of-service attack due to quadratic time complexity when parsing a value with many separators inside a quoted parameter. An unauthenticated request could reach this parsing through headers such as `Accept` or `Content-Type`, for instance via the content negotiation performed by `HttpRequest.accepts()`. The per-call length limit does not bound the combined size of repeated headers. 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 Jisung Chae 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	`3:5.2.18-1`	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`	vulnerable
Suse	python-Django	linux enterprise module for package hub 15 sp7	`4.2.11-150600.3.68.1`	fixed
Opensuse	python-Django	tumbleweed	`6.1.2-1.1`	fixed
Opensuse	python-Django5	tumbleweed	`5.2.18-1.1`	fixed
Opensuse	python-Django4	tumbleweed	`4.2.30-6.1`	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	`(unfixed)`	not yet assigned	Not reported	[1150176]
Suse	python-Django	rpm	linux enterprise module for package hub 15 sp7	`4.2.11-150600.3.68.1`	Not reported	SUSE-SU-2026:4626-1	Not reported
Opensuse	python-Django	rpm	tumbleweed	`6.1.2-1.1`	Not reported	OPENSUSE-SU-2026:12103-1	Not reported
Opensuse	python-Django5	rpm	tumbleweed	`5.2.18-1.1`	Not reported	OPENSUSE-SU-2026:12095-1	Not reported
Opensuse	python-Django4	rpm	tumbleweed	`4.2.30-6.1`	Not reported	OPENSUSE-SU-2026:12086-1	Not reported

[Debian bug #1150176]

Notes

[bookworm] python-django: Invasive fix as it requires backporting another refactor, as well as adjusting the highly-finicky str/bytes distiction

OpenFactory catalog packages

[Debian 12 (Bookworm)]

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

[openSUSE Tumbleweed]

[python313-Django]Unknown
Source package: [python-Django]
Details (1)
- 6.0.8-1.1 · noarch · tumbleweed
  Unknown · Fixed: 6.1.2-1.1
  Version impact unknown
  nvd · python-Django · opensuse · tumbleweed
[python313-Django4]Unknown
Source package: [python-Django4]
Details (1)
- 4.2.30-5.1 · noarch · tumbleweed
  Unknown · Fixed: 4.2.30-6.1
  Version impact unknown
  nvd · python-Django4 · opensuse · tumbleweed
[python313-Django5]Unknown
Source package: [python-Django5]
Details (1)
- 5.2.17-1.1 · noarch · tumbleweed
  Unknown · Fixed: 5.2.18-1.1
  Version impact unknown
  nvd · python-Django5 · opensuse · tumbleweed
[python314-Django]Unknown
Source package: [python-Django]
Details (1)
- 6.0.8-1.1 · noarch · tumbleweed
  Unknown · Fixed: 6.1.2-1.1
  Version impact unknown
  nvd · python-Django · opensuse · tumbleweed
[python314-Django4]Unknown
Source package: [python-Django4]
Details (1)
- 4.2.30-5.1 · noarch · tumbleweed
  Unknown · Fixed: 4.2.30-6.1
  Version impact unknown
  nvd · python-Django4 · opensuse · tumbleweed
[python314-Django5]Unknown
Source package: [python-Django5]
Details (1)
- 5.2.17-1.1 · noarch · tumbleweed
  Unknown · Fixed: 5.2.18-1.1
  Version impact unknown
  nvd · python-Django5 · opensuse · tumbleweed

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]