CVE-2026-6907
Description
A flaw was found in Django. The django.middleware.cache.UpdateCacheMiddleware component incorrectly caches web requests when the Vary header contains an asterisk ('*'). This error can lead to sensitive private data being stored in the cache and subsequently served to unauthorized users, resulting in information disclosure.
Mitigation
To mitigate this issue, disable the `django.middleware.cache.UpdateCacheMiddleware` in your Django application's `settings.py` file by removing it from the `MIDDLEWARE` list. This action prevents the erroneous caching of requests with an asterisk in the `Vary` header, thereby eliminating the information disclosure vulnerability. Be aware that disabling this middleware will also deactivate Django's built-in caching functionality, which may affect application performance and behavior. A restart of the Django application server is required for this change to take effect.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.3 | 5.3 | 4.3 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | Low | Low | Low |
| Privileges Required | None | None | None |
| User Interaction | Required | None | Required |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | Low | Low | Low |
| Integrity Impact | None | None | None |
| Availability Impact | None | None | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
