CVE-2026-48587 Details
Description
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.
A vulnerability exists in Django versions 5.2 prior to 5.2.15 and 6.0 prior to 6.0.6, where the `django.utils.cache.has_vary_header()` function does not remove leading or trailing whitespace from `Vary` header values before making comparisons. This oversight allows remote attackers to access cached responses by sending requests to URLs with whitespace-padded `Vary` header values. Earlier, unsupported Django versions (such as 5.0.x, 4.1.x, and 3.2.x) may also be affected but were not evaluated.
Users can upgrade to Django versions 5.2.15 or 6.0.6 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://docs.djangoproject.com/en/dev/releases/security/ | Django Software Foundation | PatchVendor Advisory |
| https://groups.google.com/g/django-announce | Django Software Foundation | Release Notes |
| https://www.djangoproject.com/weblog/2026/jun/03/security-releases/ | Django Software Foundation | PatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1023 | Incomplete Comparison with Missing Factors | Django Software Foundation |
Affected Products
| Product | Versions |
|---|---|
| djangoproject django | >= 5.2, < 5.2.15 >= 6.0, < 6.0.6 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 21, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | Django Software Foundation |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 5, 2026 | Initial Analysis | [email protected] |
| Jun 3, 2026 | New CVE Received | Django Software Foundation |