UBUNTU-CVE-2026-8404

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Source
https://ubuntu.com/security/CVE-2026-8404
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8404.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-8404
Upstream
Downstream
Related
Published
2026-06-03T13:00:00Z
Modified
2026-10-02T12:18:40Z
Severity
  • 3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS Calculator
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:Pro:20.04:LTS / python-django

Package

Name
python-django
Purl
pkg:deb/ubuntu/python-django?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2:2.2.12-1ubuntu0.29+esm10

Affected versions

1:1.*
1:1.11.22-1ubuntu1
2:2.*
2:2.2.6-1ubuntu1
2:2.2.9-2ubuntu1
2:2.2.10-1
2:2.2.10-1ubuntu1
2:2.2.11-1
2:2.2.12-1
2:2.2.12-1ubuntu0.1
2:2.2.12-1ubuntu0.2
2:2.2.12-1ubuntu0.3
2:2.2.12-1ubuntu0.4
2:2.2.12-1ubuntu0.5
2:2.2.12-1ubuntu0.6
2:2.2.12-1ubuntu0.7
2:2.2.12-1ubuntu0.8
2:2.2.12-1ubuntu0.9
2:2.2.12-1ubuntu0.10
2:2.2.12-1ubuntu0.11
2:2.2.12-1ubuntu0.12
2:2.2.12-1ubuntu0.13
2:2.2.12-1ubuntu0.14
2:2.2.12-1ubuntu0.15
2:2.2.12-1ubuntu0.16
2:2.2.12-1ubuntu0.17
2:2.2.12-1ubuntu0.18
2:2.2.12-1ubuntu0.19
2:2.2.12-1ubuntu0.20
2:2.2.12-1ubuntu0.21
2:2.2.12-1ubuntu0.22
2:2.2.12-1ubuntu0.23
2:2.2.12-1ubuntu0.24
2:2.2.12-1ubuntu0.25
2:2.2.12-1ubuntu0.26
2:2.2.12-1ubuntu0.27
2:2.2.12-1ubuntu0.28
2:2.2.12-1ubuntu0.29
2:2.2.12-1ubuntu0.29+esm1
2:2.2.12-1ubuntu0.29+esm2
2:2.2.12-1ubuntu0.29+esm3
2:2.2.12-1ubuntu0.29+esm4
2:2.2.12-1ubuntu0.29+esm5
2:2.2.12-1ubuntu0.29+esm6
2:2.2.12-1ubuntu0.29+esm7
2:2.2.12-1ubuntu0.29+esm8

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python3-django",
            "binary_version": "2:2.2.12-1ubuntu0.29+esm10"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8404.json"

Ubuntu:22.04:LTS / python-django

Package

Name
python-django
Purl
pkg:deb/ubuntu/python-django?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2:3.2.12-2ubuntu1.29

Affected versions

2:2.*
2:2.2.24-1ubuntu1
2:3.*
2:3.2.12-2
2:3.2.12-2ubuntu1
2:3.2.12-2ubuntu1.1
2:3.2.12-2ubuntu1.2
2:3.2.12-2ubuntu1.3
2:3.2.12-2ubuntu1.4
2:3.2.12-2ubuntu1.5
2:3.2.12-2ubuntu1.6
2:3.2.12-2ubuntu1.7
2:3.2.12-2ubuntu1.8
2:3.2.12-2ubuntu1.9
2:3.2.12-2ubuntu1.10
2:3.2.12-2ubuntu1.11
2:3.2.12-2ubuntu1.12
2:3.2.12-2ubuntu1.13
2:3.2.12-2ubuntu1.14
2:3.2.12-2ubuntu1.15
2:3.2.12-2ubuntu1.16
2:3.2.12-2ubuntu1.17
2:3.2.12-2ubuntu1.18
2:3.2.12-2ubuntu1.19
2:3.2.12-2ubuntu1.20
2:3.2.12-2ubuntu1.21
2:3.2.12-2ubuntu1.22
2:3.2.12-2ubuntu1.23
2:3.2.12-2ubuntu1.24
2:3.2.12-2ubuntu1.25
2:3.2.12-2ubuntu1.26
2:3.2.12-2ubuntu1.27

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-django",
            "binary_version": "2:3.2.12-2ubuntu1.29"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8404.json"

Ubuntu:24.04:LTS / python-django

Package

Name
python-django
Purl
pkg:deb/ubuntu/python-django?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3:4.2.11-1ubuntu1.18

Affected versions

3:4.*
3:4.2.4-1ubuntu2
3:4.2.8-1
3:4.2.9-1
3:4.2.11-1
3:4.2.11-1ubuntu1
3:4.2.11-1ubuntu1.1
3:4.2.11-1ubuntu1.2
3:4.2.11-1ubuntu1.3
3:4.2.11-1ubuntu1.4
3:4.2.11-1ubuntu1.5
3:4.2.11-1ubuntu1.6
3:4.2.11-1ubuntu1.7
3:4.2.11-1ubuntu1.8
3:4.2.11-1ubuntu1.9
3:4.2.11-1ubuntu1.10
3:4.2.11-1ubuntu1.11
3:4.2.11-1ubuntu1.12
3:4.2.11-1ubuntu1.13
3:4.2.11-1ubuntu1.14
3:4.2.11-1ubuntu1.15
3:4.2.11-1ubuntu1.16

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-django",
            "binary_version": "3:4.2.11-1ubuntu1.18"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8404.json"

Ubuntu:25.10 / python-django

Package

Name
python-django
Purl
pkg:deb/ubuntu/python-django?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3:4.*
3:4.2.18-1ubuntu1
3:4.2.18-1ubuntu1.1
3:5.*
3:5.2.4-1
3:5.2.4-1ubuntu1
3:5.2.4-1ubuntu2
3:5.2.4-1ubuntu2.1
3:5.2.4-1ubuntu2.2
3:5.2.4-1ubuntu2.3
3:5.2.4-1ubuntu2.4
3:5.2.4-1ubuntu2.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-django",
            "binary_version": "3:5.2.4-1ubuntu2.5"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8404.json"

Ubuntu:26.04:LTS / python-django

Package

Name
python-django
Purl
pkg:deb/ubuntu/python-django?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3:5.2.9-0ubuntu4.3

Affected versions

3:5.*
3:5.2.4-1ubuntu2
3:5.2.4-1ubuntu3
3:5.2.9-0ubuntu1
3:5.2.9-0ubuntu2
3:5.2.9-0ubuntu3
3:5.2.9-0ubuntu4
3:5.2.9-0ubuntu4.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-django",
            "binary_version": "3:5.2.9-0ubuntu4.3"
        }
    ],
    "priority_reason": "The Django developers have rated this issue as being low severity"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8404.json"