{"cve":"CVE-2026-57579","nvd":{"published":"2026-09-14T17:17:49.267","modified":"2026-09-30T19:57:08.043","status":"Deferred","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 Anonymous callers can retrieve restricted and unpublished page metadata that the sibling show action denies.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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-862"],"references":["https://github.com/AlchemyCMS/alchemy_cms/commit/30888fb41d8b71fdfb3b116a7efccd851d73e1f3","https://github.com/AlchemyCMS/alchemy_cms/commit/5620e76f0d274d6f69f34281b7e46d01879f6b99","https://github.com/AlchemyCMS/alchemy_cms/commit/8417a2e9dcb00653c8b238f8a040b09532dd4c0f","https://github.com/AlchemyCMS/alchemy_cms/commit/85702d9fe4e247649b1358900c5af853e83b4a3a","https://github.com/AlchemyCMS/alchemy_cms/commit/a082dd0afe188d199f386a5e1db01987d0de807f"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-57579","score":0.00648,"percentile":0.50748,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-mqq5-j7w8-2hgh","url":"https://osv.dev/vulnerability/GHSA-mqq5-j7w8-2hgh","summary":"AlchemyCMS: Unauthenticated nested page API leaks restricted & unpublished content","modified":"2026-09-15T03:56:01.761610104Z","packages":[{"ecosystem":"RubyGems","name":"alchemy_cms","purl":"pkg:gem/alchemy_cms","ranges":[">=8.2.0 <8.2.6"],"fixed":["8.2.6"]},{"ecosystem":"RubyGems","name":"alchemy_cms","purl":"pkg:gem/alchemy_cms","ranges":[">=8.1.0 <8.1.14"],"fixed":["8.1.14"]},{"ecosystem":"RubyGems","name":"alchemy_cms","purl":"pkg:gem/alchemy_cms","ranges":[">=8.0.0.a <8.0.15"],"fixed":["8.0.15"]},{"ecosystem":"RubyGems","name":"alchemy_cms","purl":"pkg:gem/alchemy_cms","ranges":["<7.4.15"],"fixed":["7.4.15"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}