CVE-2026-113658highCWE-400CWE-459CWE-770

CVE-2026-113658: high-severity vulnerability in apostrophecms apostrophe

ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.6%
exploitation probability
0.6%top 51% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
apostrophecms · apostrophe
Related CVEs — apostrophecms apostrophe

In the same product, most dangerous first.

CVE-2026-113711HIGHApostropheCMS: Unauthenticated resource exhaustion via pre-auth aposBigUpload processing in @apostrophecms/import-exportEPSS 0.6%CVE-2026-112953MEDIUMApostropheCMS: Exposure of Sensitive Information via predictable export filenamesEPSS 0.6%CVE-2026-112955MEDIUMApostropheCMS: Import archives can exhaust server storage and deny serviceEPSS 0.5%CVE-2026-33888MEDIUMApostropheCMS: publicApiProjection Bypass via `project` Query Builder in Piece-Type REST APIEPSS 0.5%CVE-2026-113664MEDIUMApostropheCMS import-export tar guard misses './..' because it is a literal '../' substring testEPSS 0.5%CVE-2026-113656MEDIUMApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoSEPSS 0.5%
References
https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845cehttps://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9