GHSA-3h9f-r86x-qvjx BIT-django-2026-48588 CVE-2026-48588 PYSEC-2026-2090
Django: cache middleware may expose private responses when unrelated request cookies are present
- Severity
- 0.0 / 10
- Medium · CVSS 4.0
- Exploit chance (EPSS)
- 0.43%
- Chance of exploitation in the next 30 days. Higher than 37.12% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-524 Use of Cache Containing Sensitive Information
- Fix
5.2.16- Upgrade django to this version or later
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 versions
PyPI
| Package | Vulnerable | Fixed in |
|---|---|---|
| django | < 5.2.16 |
5.2.16 |
| django | >= 6.0.0, < 6.0.7 |
6.0.7 |
| django | >= 5.2, < 5.2.16>= 6.0, < 6.0.7 |
5.2.166.0.7 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
django PyPI → 5.2.16
- pip
pip install --upgrade "django>=5.2.16"- poetry
poetry add "django>=5.2.16"- uv
uv add "django>=5.2.16"
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- Present
- Privileges required
- None
- User interaction
- Passive
- Confidentiality (vulnerable system)
- Low
- Integrity (vulnerable system)
- None
- Availability (vulnerable system)
- None
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
CVSS 3.1 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Weakness
CWE-524: Use of Cache Containing Sensitive Information
The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere.
How to prevent it
- Architecture and Design: Protect information stored in cache.
- Architecture and Design: Do not store unnecessarily sensitive information in the cache.
- Architecture and Design: Consider using encryption in the cache.
References
Advisories
Fixes and patches
Packages
Other links
- github.com/django/django/commit/64f9a2b2283fde3ec69fb0dfe441cf0f6f411ba3
- github.com/django/django/commit/6e365f8d01f2ba0bbd90968d76a42600fb8bc4b1
- github.com/django/django/commit/721685aa7799cc9327bd202cd1f70bd012ca95a7
- docs.djangoproject.com/en/dev/releases/security
- github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-2090.yaml
- groups.google.com/g/django-announce
- djangoproject.com/weblog/2026/jul/07/security-releases
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-q238-5cxm-5c9h Django GeoDjango vulnerable to denial of service through deeply nested geometry collections | Medium | Also affects django |
| GHSA-wvqv-fj8w-qmhm Django GeoDjango spatial lookups allow file writes and outbound requests through GDAL raster parsing | High | Also affects django |
| GHSA-8qcx-xf44-272x Django: DomainNameValidator permits newline characters that may enable HTTP header injection | Medium | Also affects django |
| GHSA-crhf-3pfg-w68w Django: GDALRaster may over-read heap memory when constructed from bytes | Medium | Also affects django |
| GHSA-8cjm-8mp7-r2xf Django: UpdateCacheMiddleware may disclose cached responses due to case-sensitive Cache-Control handling | Medium | Also affects django |
| GHSA-mm6v-q8q9-pgcf Django fails to prevent reuse of a partially-initialized connection after a failed `STARTTLS` handshake | Low | Also affects django |
| GHSA-h7pc-vwp9-298g Django: signed cookies are vulnerable to salt namespace collisions | Medium | Also affects django |
| GHSA-923m-gv2p-w5qp Django: has_vary_header may expose cached responses when Vary values contain whitespace | Medium | Also affects django |
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