CVE-2026-57579: CWE-862: Missing Authorization in AlchemyCMS alchemy_cms
Alchemy is an open source content management system engine written in Ruby on Rails. Prior to 7.4.15, 8.0.15, 8.1.14, and 8.2.6, the unauthenticated GET /api/pages/nested endpoint implemented by Api::PagesController#nested in app/controllers/alchemy/api/pages_controller.rb returns an unfiltered page tree because it performs no authorization and does not scope descendants by the caller's ability. Anonymous callers can retrieve restricted and unpublished page metadata that the sibling show action denies. When elements=true is supplied, PageTreeSerializer also returns element and ingredient content from restricted pages because PageTreePreloader and the serializer do not apply an ability check to those records. This issue is fixed in versions 7.4.15, 8.0.15, 8.1.14, and 8.2.6.
AI Analysis
Technical Summary
AlchemyCMS, an open source Ruby on Rails content management system, has a missing authorization vulnerability (CWE-862) in the Api::PagesController#nested endpoint. Prior to versions 7.4.15, 8.0.15, 8.1.14, and 8.2.6, the GET /api/pages/nested endpoint returns an unfiltered page tree without verifying the caller's permissions. This allows unauthenticated users to access restricted and unpublished page metadata, including element and ingredient content, bypassing intended access controls. The vulnerability is due to the lack of ability checks in the PageTreePreloader and PageTreeSerializer components. The issue is resolved in the specified fixed versions.
Potential Impact
Anonymous attackers can retrieve sensitive and restricted page metadata and content from AlchemyCMS instances running vulnerable versions. This exposure includes unpublished pages and their associated elements and ingredients, potentially leading to information disclosure. The vulnerability does not allow modification or denial of service but results in high confidentiality impact.
Mitigation Recommendations
Upgrade AlchemyCMS to one of the fixed versions: 7.4.15, 8.0.15, 8.1.14, or 8.2.6. These versions include proper authorization checks on the /api/pages/nested endpoint, preventing unauthorized access to restricted content. No other mitigation is indicated or required.
CVE-2026-57579: CWE-862: Missing Authorization in AlchemyCMS alchemy_cms
Description
Alchemy is an open source content management system engine written in Ruby on Rails. Prior to 7.4.15, 8.0.15, 8.1.14, and 8.2.6, the unauthenticated GET /api/pages/nested endpoint implemented by Api::PagesController#nested in app/controllers/alchemy/api/pages_controller.rb returns an unfiltered page tree because it performs no authorization and does not scope descendants by the caller's ability. Anonymous callers can retrieve restricted and unpublished page metadata that the sibling show action denies. When elements=true is supplied, PageTreeSerializer also returns element and ingredient content from restricted pages because PageTreePreloader and the serializer do not apply an ability check to those records. This issue is fixed in versions 7.4.15, 8.0.15, 8.1.14, and 8.2.6.
CVSS v3.1
Score 7.5high
Affected software
AlchemyCMS
alchemy_cms
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
AlchemyCMS, an open source Ruby on Rails content management system, has a missing authorization vulnerability (CWE-862) in the Api::PagesController#nested endpoint. Prior to versions 7.4.15, 8.0.15, 8.1.14, and 8.2.6, the GET /api/pages/nested endpoint returns an unfiltered page tree without verifying the caller's permissions. This allows unauthenticated users to access restricted and unpublished page metadata, including element and ingredient content, bypassing intended access controls. The vulnerability is due to the lack of ability checks in the PageTreePreloader and PageTreeSerializer components. The issue is resolved in the specified fixed versions.
Potential Impact
Anonymous attackers can retrieve sensitive and restricted page metadata and content from AlchemyCMS instances running vulnerable versions. This exposure includes unpublished pages and their associated elements and ingredients, potentially leading to information disclosure. The vulnerability does not allow modification or denial of service but results in high confidentiality impact.
Mitigation Recommendations
Upgrade AlchemyCMS to one of the fixed versions: 7.4.15, 8.0.15, 8.1.14, or 8.2.6. These versions include proper authorization checks on the /api/pages/nested endpoint, preventing unauthorized access to restricted content. No other mitigation is indicated or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-24T18:49:56.208Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa8289355bf5e2cf557f789
Added to database: 09/14/2026, 17:02:11 UTC
Last enriched: 09/14/2026, 17:16:28 UTC
Last updated: 09/14/2026, 17:48:39 UTC
Views: 5
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