django CMS: Page cache ignores plugin-declared Vary headers (disclosure & poisoning)
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54625
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 16:11 UTC · Revision 1
Source evidence
django CMS: Page cache ignores plugin-declared Vary headers (disclosure & poisoning)
core-osv · Original sourcePublished 20 Aug 2026, 17:58 UTC
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.
osv:CVE-2026-54625
Complete source record
{
"id": "830331ed22bc72f4a435080ad43831fda2879b05701e2ec8cd474c9d989f6b7a",
"url": "https://osv.dev/vulnerability/CVE-2026-54625",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "django CMS: Page cache ignores plugin-declared Vary headers (disclosure & poisoning)",
"summary": "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.",
"evidence": "osv:CVE-2026-54625",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-54625",
"aliases": [
"CVE-2026-54625",
"GHSA-fwjf-m4qw-9f2x",
"PYSEC-2026-3824"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"
}
],
"affected": [
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"repo": "https://github.com/django-cms/django-cms",
"type": "GIT",
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"fixed": "d399600a1c06918757c32b4f06d69118e1a7a5bf"
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{
"fixed": "8758714b865ffa79c6bcd0e5c503958ea48885aa"
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
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"source": "REFERENCES_COMMIT"
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"source": "REFERENCES_TAG",
"original_tag": "5.0.8"
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54625.json"
}
}
],
"modified": "2026-10-28T02:30:30.352312200Z",
"provider": "osv",
"references": [
"https://github.com/django-cms/django-cms/releases/tag/5.0.8",
"https://github.com/django-cms/django-cms/releases/tag/5.1.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54625.json",
"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/commit/8758714b865ffa79c6bcd0e5c503958ea48885aa",
"https://github.com/django-cms/django-cms/commit/d5dc1efa18d157445491c4b12c2dd1efd56f439f",
"https://github.com/django-cms/django-cms/pull/8646",
"https://github.com/django-cms/django-cms/pull/8647"
],
"provider_metadata": {
"cwe_ids": [
"CWE-349",
"CWE-524"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54625.json"
}
},
"related_cves": [
{
"value": "CVE-2026-54625",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 497169,
"published_at": "2026-08-20T17:58:03.255+00:00"
}