CVE-2026-113658 Details
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.
A denial-of-service vulnerability has been identified in ApostropheCMS versions prior to 4.33.0. The issue arises in the unauthenticated Rich Text CSV conversion endpoint, where uploaded files are temporarily stored before their extensions are validated. If a file is rejected for having an invalid extension, the temporary file is not deleted. This oversight allows an attacker to repeatedly upload large files, using the public CSRF cookie, which can exhaust the server's temporary disk space. This accumulation of files can disrupt not only ApostropheCMS but also other services that share the same disk partition.
Users can update to ApostropheCMS version 4.33.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 20, 2026CISA-ADP
Assessed Oct 23, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce | [email protected] | Source CodeVendor |
| https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350 | [email protected] | Source CodeVendor |
| https://github.com/apostrophecms/apostrophe/releases/tag/[email protected] | [email protected] | Release NotesVendor |
| https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
| CWE-459 | Incomplete Cleanup | [email protected] |
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ApostropheCMS | < 4.33.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 23, 2026 | CVE Modified | CISA-ADP |
| Oct 20, 2026 | New CVE Received | [email protected] |