CVE-2026-48588
Description
A flaw was found in Django. When django.middleware.cache.UpdateCacheMiddleware or django.views.decorators.cache.cache_page is in use, responses that set a cookie are not excluded from caching if the request includes any cookie, even when that cookie is unrelated to the response (for example, a language or theme preference). A remote attacker can retrieve a cached response intended for another user and obtain sensitive cookie data from the stored Set-Cookie header.
Statement
This flaw is rated as Low impact. When Django's UpdateCacheMiddleware or cache_page decorator is configured, responses containing sensitive Set-Cookie headers may be improperly cached and subsequently disclosed to other users if the initial request included any cookie. This issue primarily affects Red Hat products utilizing Django with specific caching configurations, potentially leading to limited information exposure.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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 | 3.1 | 5.3 | 3.1 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | High | Low | High |
| 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:H/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:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Red Hat CVSS v3 Score Explanation
We believe that a useful leak requires uncommon shared-cache configuration (AC:H) and a prior victim (or other user) response that deposits a sensitive cookie into that cache before the attacker can retrieve it (UI:R); an attacker priming the cache only exposes their own session, so confidentiality is not attacker-controlled alone.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
Frequently Asked Questions
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