[ CVE-2026-113656 · Published 20 Oct 2026 ]

ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS

CVSS 5.3 EPSS <1%Fix available

[ Description ]Official description

ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume temporary disk storage and disrupt form handling or other host services. This issue is fixed in ApostropheCMS Form 1.5.5.

[ Fixes ]Fixes and patches

  • @apostrophecms/form 1.5.5Fixed version · GitHub Advisories · npm package @apostrophecms/form: upgrade to 1.5.5 or later (affected < 1.5.5)

[ Packages ]Affected open-source packages