An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.
django.utils.cache.has_vary_header() in Django does not strip leading or trailing whitespace from Vary response header values before comparison, which allows remote attackers to read cached responses via requests to URLs whose responses contain whitespace-padded Vary header 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 Navid Rezazadeh for reporting this issue.
Weakness
The product performs a comparison between entities that must consider multiple factors or characteristics of each entity, but the comparison does not include one or more of these factors.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Django | Djangoproject | 5.2 (including) | 5.2.15 (excluding) |
| Django | Djangoproject | 6.0 (including) | 6.0.6 (excluding) |
| Python-django | Ubuntu | questing | * |