Resource exhaustion in Apostrophecms Apostrophe
CVE-2026-113658
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Apostrophecms Apostrophe — versions < 4.33.0
Weakness classification (CWE)
References
- github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9
- github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed09438…
- github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130…
- github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0
Frequently asked questions
- What is CVE-2026-113658?
- CVE-2026-113658 is a high-severity vulnerability in Apostrophecms Apostrophe, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-10-20.
- How severe is CVE-2026-113658?
- High severity. CVSS v3 base score is 7.5 out of 10.