CVE-2026-8404

python3-django: An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6

CVE-2026-8404 is fixed in 3 products on 1 platform, first by python3-django 2:2.2.12-1ubuntu0.29+esm10, released June 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.3
Low
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0027
19th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
python-Django · opensuse-leap 16.0 5.2.4-bp160.9.1 OPENSUSE-SU-2026:20937-1 Jun 10, 2026
python-Django · sles 15.7 4.2.11-150600.3.59.1 SUSE-SU-2026:2318-1 Jun 9, 2026
python-django · Debian 14 3:5.2.15-1 DEBIAN-CVE-2026-8404 Jun 25, 2026
python3-django · Ubuntu 20.04 LTS (focal) 2:2.2.12-1ubuntu0.29+esm10 python3-django 2:2.2.12-1ubuntu0.29+esm10 Jun 3, 2026
python3-django · Ubuntu 22.04.1 LTS (jammy) 2:3.2.12-2ubuntu1.29 python3-django 2:3.2.12-2ubuntu1.29 Aug 4, 2026
python3-django · Ubuntu 24.04.5 LTS (noble) 3:4.2.11-1ubuntu1.18 python3-django 3:4.2.11-1ubuntu1.18 Aug 4, 2026
python3-django · Ubuntu 26.04.1 LTS (resolute) 3:5.2.9-0ubuntu4.3 python3-django 3:5.2.9-0ubuntu4.3 Aug 4, 2026

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