CVE-2026-113658CWE-400CWE-459CWE-770denial-of-service

CVE-2026-113658

High · published October 20, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
44.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00538 · 44.5th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-459 · Incomplete Cleanup; CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-10-20T21:17Z
References (5)
https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce · [email protected]https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350 · [email protected]https://github.com/apostrophecms/apostrophe/releases/tag/[email protected] · [email protected]https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9 · [email protected]https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 1%
    epss
  • 20 OCT 16:56Z
    ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory
    cvelistv5
  • 20 OCT 16:56Z
    ApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directory
    cvelistv5