low3.1
CVE-2026-35193
Django: UpdateCacheMiddleware may disclose private cached responses by omitting Authorization from Vary
Impact
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 add `Authorization` to the `Vary` response header for requests bearing that header without `Cache-Control: public`, which allows remote attackers to read private cached responses via unauthenticated requests to the same URL. 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 Shai Berger for reporting this issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | django | >= 5.2.0, < 5.2.15 | 5.2.15 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Djangoproject | Django | from 5.2 before 5.2.15 from 6.0 before 6.0.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qpc8-7fxc-cm4p
- https://nvd.nist.gov/vuln/detail/CVE-2026-35193
- https://docs.djangoproject.com/en/dev/releases/security
- https://groups.google.com/g/django-announce
- https://www.djangoproject.com/weblog/2026/jun/03/security-releases
- https://github.com/django/django/commit/050a3dc276f9142067260e990e4d8d42d5e32863
- https://github.com/django/django/commit/664652f1a2dd80d8a4cd491b4313cad915ae6669
- https://github.com/django/django/commit/a2faa8e895926ac5d63f72879b5ccf671b5b4ba9
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-197.yaml
- https://docs.djangoproject.com/en/dev/releases/security/
- https://www.djangoproject.com/weblog/2026/jun/03/security-releases/