CVE-2026-54625 PUBLISHED

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

Assigner: GitHub_M
Reserved: 15.06.2026 Published: 20.08.2026 Updated: 20.08.2026

django 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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS Score: 4.8

Product Status

Vendor django-cms
Product django-cms
Versions
  • Version < 5.0.8 is affected
  • Version >= 5.1.0a1, < 5.1.0 is affected

References

Problem Types

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