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[ CVE-2026-112952 · Published 20 Oct 2026 ]

ApostropheCMS: POST /api/v1/@apostrophecms/doc/slugTaken discloses existence of private/admin-only content to any authenticated user

CVSS 4.3 EPSS <1%Fix available

[ Description ]Official description

ApostropheCMS is an open-source Node.js content management system. Prior to 4.34.0, 'POST /api/v1/@apostrophecms/doc/slugTaken' with body { "slug": "target-slug" } returns a boolean indicating whether a slug is in use across all document types and visibility levels, with no permission or type filter. Any logged-in user (including editors) can enumerate the slug space of private pages, drafts, and archived content. This issue is fixed in version 4.34.0.

[ Fixes ]Fixes and patches

  • apostrophe 4.34.0Fixed version · GitHub Advisories · npm package apostrophe: upgrade to 4.34.0 or later (affected < 4.34.0)

[ Packages ]Affected open-source packages

[ References ]References