Resource exhaustion in @Apostrophecms Form
CVE-2026-113656
ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume temporary disk storage and disrupt form handling or other host services. This issue is fixed in ApostropheCMS Form 1.5.5.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
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 Form — versions < 1.5.5
- Apostrophecms Apostrophe — versions < 4.33.0
Weakness classification (CWE)
References
- github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f
- github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed09438…
- github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130…
- github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5
Frequently asked questions
- What is CVE-2026-113656?
- CVE-2026-113656 is a medium-severity vulnerability in @Apostrophecms Form, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-10-20.
- How severe is CVE-2026-113656?
- Medium severity. CVSS v3 base score is 5.3 out of 10.