---
id: CVE-2026-113658
title: >-
  ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in
  the system temporary directory
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-400
  - CWE-459
  - CWE-770
vendor: apostrophecms
product: apostrophe
affected:
  - apostrophe < 4.33.0
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-23T01:54:34.347813Z'
exploitAvailable: true
published: '2026-10-20'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T01:55:01.966Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113658'
references:
  - url: >-
      https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9
    label: >-
      https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9
  - url: >-
      https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
    label: >-
      https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
  - url: >-
      https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
    label: >-
      https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
  - url: 'https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0'
    label: 'https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0'
  - url: 'https://github.com/advisories/GHSA-qhcq-9pm2-c9w9'
tags:
  - cve.org
  - exploit-available
  - ghsa
  - npm
epss: 0.00615
epssPercentile: 0.49241
aliases:
  - GHSA-qhcq-9pm2-c9w9
ecosystem: npm
patched:
  - apostrophe 4.33.0
ingestedAt: '2026-10-20T17:12:53.594Z'
---

## Overview

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.

## Affected

- `apostrophe < 4.33.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-113658)

Affected packages:

- `apostrophe < 4.33.0`

Patched in:

- `apostrophe 4.33.0`

Source: https://github.com/advisories/GHSA-qhcq-9pm2-c9w9