GHSA-mqq5-j7w8-2hgh: AlchemyCMS: Unauthenticated nested page API leaks restricted & unpublished content

June 19, 2026

The unauthenticated GET /api/pages/nested endpoint returns the full page tree to any anonymous caller, including restricted (member-only) pages and unpublished/draft pages that should be hidden. Appending ?elements=true additionally dumps the element/ingredient content of restricted pages, fully bypassing the access control the sibling show and index actions enforce.

References

github.com/AlchemyCMS/alchemy_cms/security/advisories/GHSA-mqq5-j7w8-2hgh
github.com/advisories/GHSA-mqq5-j7w8-2hgh

Code Behaviors & Features

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