Alchemy: Unauthenticated nested page API leaks restricted & unpublished content
Summary
| CVE | CVE-2026-57579 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-14 17:17:49 UTC |
| Updated | 2026-09-14 17:17:49 UTC |
| 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 Anonymous callers can retrieve restricted and unpublished page metadata that the sibling show action denies.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. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Problem Types: CWE-862 | CWE-862 CWE-862: Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | AlchemyCMS | Alchemy Cms | affected < 7.4.15 | Not specified |
| CNA | AlchemyCMS | Alchemy Cms | affected >= 8.0.0, < 8.0.15 | Not specified |
| CNA | AlchemyCMS | Alchemy Cms | affected >= 8.1.0, < 8.1.14 | Not specified |
| CNA | AlchemyCMS | Alchemy Cms | affected >= 8.2.0, < 8.2.6 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/AlchemyCMS/alchemy_cms/commit/8417a2e9dcb00653c8b238f8a040b09... | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.0.15 | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/commit/a082dd0afe188d199f386a5e1db0198... | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/commit/30888fb41d8b71fdfb3b116a7efccd8... | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/pull/3982 | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/commit/5620e76f0d274d6f69f34281b7e46d0... | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/releases/tag/v7.4.15 | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-mqq5-j7w8-2hgh | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/commit/85702d9fe4e247649b1358900c5af85... | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.2.6 | [email protected] | github.com | |
| github.com/AlchemyCMS/alchemy_cms/releases/tag/v8.1.14 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.