[ CVE-2026-113658 · Published 20 Oct 2026 ]
ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory
CVSS 7.5
EPSS <1%Fix available
[ Description ]Official description
ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0, the unauthenticated Rich Text CSV conversion route writes a multipart upload to the system temporary directory before checking its extension and does not remove the staged file when that validation rejects it. Repeated large rejected uploads, using the normal public CSRF cookie, can persistently consume temporary-disk capacity and may disrupt ApostropheCMS and other services that depend on the same partition. This issue is fixed in version 4.33.0.
[ Fixes ]Fixes and patches
- apostrophe 4.33.0Fixed version · GitHub Advisories · npm package apostrophe: upgrade to 4.33.0 or later (affected < 4.33.0)
[ Packages ]Affected open-source packages
- apostrophe npmAffected < 4.33.0 · fixed in 4.33.0 · GHSA-qhcq-9pm2-c9w9
[ References ]References
- github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
- github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
- github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0
- github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9