CVE-2026-48587
Potential exposure of private data via whitespace padding in Vary header
CVSS Score
3.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1023 |
| Vendor | djangoproject |
| Product | django |
| Published | Jun 3, 2026 |
| Last Updated | Jun 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
djangoproject / Django
6.0 < 6.0.6 5.2 < 5.2.15
References
Credits
🔍 Navid Rezazadeh Jake Howard Natalia Bidart