CVE-2026-54625
django CMS: Page cache ignores plugin-declared Vary headers (disclosure & poisoning)
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | django-cms | < 5.0.8 | 5.0.8 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-fwjf-m4qw-9f2x
- https://github.com/django-cms/django-cms/security/advisories/GHSA-fwjf-m4qw-9f2x
- https://nvd.nist.gov/vuln/detail/CVE-2026-54625
- https://github.com/django-cms/django-cms/pull/8646
- https://github.com/django-cms/django-cms/pull/8647
- https://github.com/django-cms/django-cms/commit/8758714b865ffa79c6bcd0e5c503958ea48885aa
- https://github.com/django-cms/django-cms/commit/d5dc1efa18d157445491c4b12c2dd1efd56f439f
- https://github.com/django-cms/django-cms/releases/tag/5.0.8
- https://github.com/django-cms/django-cms/releases/tag/5.1.0