CVE catalog
CVE-2026-8404
An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitivel
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.27% · Oct 25, 2026
An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values. 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 Ahmed Badawe 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 | fixed |
| 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 |
| Cpe | python-django | Not reported | Not reported | vulnerable |
| Cpe | django | Not reported | 5.2.15 | fixed |
| Cpe | django | Not reported | 6.0.6 | fixed |
| PyPI | django | Not reported | 6.0.6 | fixed |
| PyPI | django | Not reported | 6.0.6 | fixed |
| Ubuntu | python-django | noble | 3:4.2.11-1ubuntu1.18 | fixed |
| Ubuntu | python-django-doc | noble | 3:4.2.11-1ubuntu1.18 | fixed |
| Ubuntu | python3-django | noble | 3:4.2.11-1ubuntu1.18 | fixed |
| Ubuntu | python-django | pro | 1:1.11.22-1ubuntu1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.6-1ubuntu1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.9-2ubuntu1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.10-1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.10-1ubuntu1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.11-1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.2 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.3 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.4 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.5 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.6 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.7 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.8 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.9 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.10 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.11 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.12 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.13 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.14 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.15 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.16 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.17 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.18 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.19 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.20 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.21 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.22 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.23 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.24 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.25 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.26 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.27 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.28 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm1 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm2 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm3 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm4 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm5 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm6 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm7 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm8 | vulnerable |
| Ubuntu | python-django | pro | 2:2.2.12-1ubuntu0.29+esm10 | fixed |
| Ubuntu | python-django | 22.04 | 2:2.2.24-1ubuntu1 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.1 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.2 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.3 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.4 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.5 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.6 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.7 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.8 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.9 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.10 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.11 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.12 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.13 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.14 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.15 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.16 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.17 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.18 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.19 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.20 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.21 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.22 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.23 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.24 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.25 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.26 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.27 | vulnerable |
| Ubuntu | python-django | 22.04 | 2:3.2.12-2ubuntu1.29 | fixed |
| Ubuntu | python-django | 24.04 | 3:4.2.4-1ubuntu2 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.8-1 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.9-1 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.1 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.2 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.3 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.4 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.5 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.6 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.7 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.8 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.9 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.10 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.11 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.12 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.13 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.14 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.15 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.16 | vulnerable |
| Ubuntu | python-django | 24.04 | 3:4.2.11-1ubuntu1.18 | fixed |
| Ubuntu | python-django | 25.10 | 3:4.2.18-1ubuntu1 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:4.2.18-1ubuntu1.1 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1ubuntu1 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1ubuntu2 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1ubuntu2.1 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1ubuntu2.2 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1ubuntu2.3 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1ubuntu2.4 | vulnerable |
| Ubuntu | python-django | 25.10 | 3:5.2.4-1ubuntu2.5 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.4-1ubuntu2 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.4-1ubuntu3 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.9-0ubuntu1 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.9-0ubuntu2 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.9-0ubuntu3 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.9-0ubuntu4 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.9-0ubuntu4.1 | vulnerable |
| Ubuntu | python-django | 26.04 | 3:5.2.9-0ubuntu4.3 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-django | source | sid | 3:5.2.15-1 | not yet assigned | Not reported | [1138775] |
| Debian | python-django | source | forky | 3:5.2.15-1 | not yet assigned | Not reported | [1138775] |
| Debian | python-django | source | trixie | (unfixed) | not yet assigned | Not reported | [1138775] |
| Debian | python-django | source | bookworm | (unfixed) | not yet assigned | Not reported | [1138775] |
| Cpe | django | cpe | Not reported | 5.2.15 | Not reported | Not reported | Not reported |
| Cpe | django | cpe | Not reported | 6.0.6 | Not reported | Not reported | Not reported |
| PyPI | django | PyPI | Not reported | 6.0.6 | Not reported | GHSA-8CJM-8MP7-R2XF | Not reported |
| PyPI | django | PyPI | Not reported | 6.0.6 | Not reported | Not reported | Not reported |
| Ubuntu | python-django | deb | noble | 3:4.2.11-1ubuntu1.18 | Not reported | Not reported | Not reported |
| Ubuntu | python-django-doc | deb | noble | 3:4.2.11-1ubuntu1.18 | Not reported | Not reported | Not reported |
| Ubuntu | python3-django | deb | noble | 3:4.2.11-1ubuntu1.18 | Not reported | Not reported | Not reported |
| Ubuntu | python-django | deb | pro | 2:2.2.12-1ubuntu0.29+esm10 | Not reported | UBUNTU-CVE-2026-8404 | Not reported |
| Ubuntu | python-django | deb | 22.04 | 2:3.2.12-2ubuntu1.29 | Not reported | UBUNTU-CVE-2026-8404 | Not reported |
| Ubuntu | python-django | deb | 24.04 | 3:4.2.11-1ubuntu1.18 | Not reported | UBUNTU-CVE-2026-8404 | Not reported |
| Ubuntu | python-django | deb | 26.04 | 3:5.2.9-0ubuntu4.3 | Not reported | UBUNTU-CVE-2026-8404 | Not reported |
Notes
[trixie] python-django: Minor issue [bookworm] python-django: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-django]Affected
Source package: [python-django]
Details (6)
3:3.2.25-0+deb12u3· all · bookwormAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:3.2.25-0+deb12u3· all · bookwormAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:4.2.21-1~bpo12+1· all · bookworm-backportsAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:4.2.21-1~bpo12+1· all · bookworm-backportsAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:3.2.25-0+deb12u4· all · bookworm-securityAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:3.2.25-0+deb12u4· all · bookworm-securityAffected
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 · bookwormAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:3.2.25-0+deb12u3· all · bookwormAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:4.2.21-1~bpo12+1· all · bookworm-backportsAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:4.2.21-1~bpo12+1· all · bookworm-backportsAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:3.2.25-0+deb12u4· all · bookworm-securityAffected
nvd · python-django · debian · bookworm; nvd · python-django · debian · 12
3:3.2.25-0+deb12u4· all · bookworm-securityAffected
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 · trixieAffected
nvd · python-django · debian · 13
3:4.2.28-0+deb13u2· all · trixieAffected
nvd · python-django · debian · 13
3:5.2.16-1~bpo13+1· all · trixie-backportsAffected
nvd · python-django · debian · 13
3:5.2.16-1~bpo13+1· all · trixie-backportsAffected
nvd · python-django · debian · 13
3:4.2.28-0+deb13u1· all · trixie-securityAffected
nvd · python-django · debian · 13
3:4.2.28-0+deb13u1· all · trixie-securityAffected
nvd · python-django · debian · 13
- [python-django-doc]Affected
Source package: [python-django]
Details (6)
3:4.2.28-0+deb13u2· all · trixieAffected
nvd · python-django · debian · 13
3:4.2.28-0+deb13u2· all · trixieAffected
nvd · python-django · debian · 13
3:5.2.16-1~bpo13+1· all · trixie-backportsAffected
nvd · python-django · debian · 13
3:5.2.16-1~bpo13+1· all · trixie-backportsAffected
nvd · python-django · debian · 13
3:4.2.28-0+deb13u1· all · trixie-securityAffected
nvd · python-django · debian · 13
3:4.2.28-0+deb13u1· all · trixie-securityAffected
nvd · python-django · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10989-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-8404]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-8404]
- [https://osv.dev/vulnerability/GHSA-8cjm-8mp7-r2xf]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-8404]
- [https://security-tracker.debian.org/tracker/CVE-2026-8404]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8404.json]
- [https://ubuntu.com/security/notices/USN-8848-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1807.json]
[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] · [Ubuntu Security Notices (USN)]