django CMS: Page cache ignores plugin-declared Vary headers (disclosure & poisoning)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54625
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-20 18:16:28 UTC
Updated2026-08-20 20:17:35 UTC
Descriptiondjango CMS is a content management system powered by Django. Prior to 5.0.8 and in 5.1.0a1, the django CMS page cache in cms/cache/page.py ignores request headers declared by plugins through get_vary_cache_on(). The _page_cache_key function includes the cache prefix, site, language, path, and timezone but not the declared header values. Although set_page_cache adds those names to the response Vary header, get_page_cache retrieves the first stored variant under the same header-agnostic key. When CMS_PAGE_CACHE is enabled and a plugin varies content on a header such as Country-Code, one visitor can receive another visitor’s request-specific content, and an unauthenticated attacker can prime the cache with attacker-chosen content. This issue is fixed in versions 5.0.8 and 5.1.0.

Risk And Classification

Primary CVSS: v3.1 4.8 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.001470000 probability, percentile 0.044790000 (date 2026-08-22)

Problem Types: CWE-349 | CWE-524 | CWE-349 CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data | CWE-524 CWE-524: Use of Cache Containing Sensitive Information

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED4.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Django-cms Django-cms affected < 5.0.8 Not specified
CNA Django-cms Django-cms affected >= 5.1.0a1, < 5.1.0 Not specified

References

ReferenceSourceLinkTags
github.com/django-cms/django-cms/security/advisories/GHSA-fwjf-m4qw-9f2x [email protected] github.com
github.com/django-cms/django-cms/releases/tag/5.1.0 [email protected] github.com
github.com/django-cms/django-cms/pull/8647 [email protected] github.com
github.com/django-cms/django-cms/releases/tag/5.0.8 [email protected] github.com
github.com/django-cms/django-cms/commit/8758714b865ffa79c6bcd0e5c503958e... [email protected] github.com
github.com/django-cms/django-cms/commit/d5dc1efa18d157445491c4b12c2dd1ef... [email protected] github.com
github.com/django-cms/django-cms/pull/8646 [email protected] github.com
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