CVE-2026-113658

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

Published Oct 20, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-qhcq-9pm2-c9w9 ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apostrophecms
Apostrophecms apostrophecms
Vendors & Products Apostrophecms
Apostrophecms apostrophecms
Type Values Removed Values Added
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.
Title ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory
Weaknesses CWE-400
CWE-459
CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 23, 2026, 1:55 AM
Reserved
Oct 20, 2026, 2:27 PM
Status
Deferred
Published
Oct 20, 2026, 5:17 PM
Modified
Oct 23, 2026, 2:16 AM