Vulnerability · Published Jul 7, 2026 · Assigned by DSF
CVE-2026-48588Potential exposure of private data via cached Set-Cookie response
Medium 4.2
In plain English
A medium-severity security flaw in Django from djangoproject. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. `UpdateCacheMiddleware` and the `cache_page()` decorator cache responses that vary on cookies when the incoming request carries unrelated cookies, which allows remote attackers to read private data from the shared cache. 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 Chris Whyland for reporting this issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | py3-django | 5.2.16-r0 | ALPINE-CVE-2026-48588 |
| Debian:12 | python-django | 3:3.2.25-0+deb12u5 | DEBIAN-CVE-2026-48588 |
| Debian:13 | python-django | no fix listed | DEBIAN-CVE-2026-48588 |
| Debian:14 | python-django | 3:5.2.16-1 | DEBIAN-CVE-2026-48588 |
| PyPI | django | 5.2.16, 6.0.7 | PYSEC-2026-2090 |
| PyPI | django | 6.0.7 | GHSA-3h9f-r86x-qvjx |
| PyPI | django | 5.2.16 | GHSA-3h9f-r86x-qvjx |
| Ubuntu:22.04:LTS | python-django | no fix listed | UBUNTU-CVE-2026-48588 |
| Ubuntu:24.04:LTS | python-django | no fix listed | UBUNTU-CVE-2026-48588 |
| Ubuntu:25.10 | python-django | no fix listed | UBUNTU-CVE-2026-48588 |
| Ubuntu:26.04:LTS | python-django | no fix listed | UBUNTU-CVE-2026-48588 |
| Ubuntu:26.10 | python-django | no fix listed | UBUNTU-CVE-2026-48588 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| djangoproject | Django | 6.0 – before 6.0.75.2 – before 5.2.16 |
Weakness: CWE-524 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
References
- Django security archive vendor-advisory
- Django releases announcements mailing-list
- Django security releases issued: 6.0.7 and 5.2.16 vendor-advisory