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Django EUVDEUVD-2026-42043

| CVE-2026-48588 LOW
Use of Cache Containing Sensitive Information (CWE-524)
2026-07-07 DSF GHSA-3h9f-r86x-qvjx
Python Information Disclosure Django
2.3
CVSS 4.0 · Vendor: DSF

Severity by source

Vendor (DSF) PRIMARY
2.3 MEDIUM
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
3.1 LOW

AC:H reflects the three-way prerequisite (caching middleware, cookie-Vary responses, shared backend); UI:R because a victim must populate the cache first; C:L for partial private data disclosure only.

3.1 AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (DSF).

CVSS VectorVendor: DSF

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

4
Patch available
Jul 07, 2026 - 16:01 EUVD
Analysis Generated
Jul 07, 2026 - 15:24 vuln.today
Severity Changed
Jul 07, 2026 - 15:22 NVD
MEDIUM LOW
CVSS changed
Jul 07, 2026 - 15:22 NVD
4.2 (MEDIUM) 2.3 (LOW)

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 12 pypi packages depend on django (12 direct, 0 indirect)

Ecosystem-wide dependent count for version 5.2.

DescriptionCVE.org

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.

AnalysisAI

Cache poisoning in Django's UpdateCacheMiddleware and cache_page() decorator exposes private user data to unauthenticated remote attackers by incorrectly serving cached responses across different cookie contexts. Versions 6.0 before 6.0.7 and 5.2 before 5.2.16 are confirmed affected; older unsupported branches (5.0.x, 4.1.x, 3.2.x) were not evaluated but may share the flaw. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify Django app with shared cache
Delivery
Observe Vary: Cookie response headers
Exploit
Wait for victim to populate cache entry
Execution
Craft request with unrelated cookie
Impact
Retrieve victim's cached private response
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Vulnerability AssessmentAI

Exploitation Three specific conditions must all be present: (1) the application must use Django's UpdateCacheMiddleware or apply the cache_page() decorator to a view, (2) those cached responses must vary on cookies, meaning they contain or are influenced by cookie-based user state and the Vary: Cookie header is in play, and (3) the cache backend must be a shared store (e.g., Memcached or Redis) accessible across multiple users or sessions rather than a per-user local-memory cache. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 2.3 is low primarily because of AT:P (specific attack requirements present) and UI:P (a victim user must have populated the cache first). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker browses a Django application that caches authenticated user dashboard responses on a shared Memcached instance. A legitimate user makes a request that populates the cache with their private account data. …
Remediation The primary fix is upgrading to Django 6.0.7 or Django 5.2.16, both released on 2026-07-07 per the official advisory at https://www.djangoproject.com/weblog/2026/jul/07/security-releases/. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-42043 vulnerability details – vuln.today
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