CVE-2026-113656mediumCWE-770

CVE-2026-113656: medium-severity vulnerability in apostrophecms apostrophe

ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS

Published · Updated

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.3epss 0.5%
exploitation probability
0.5%top 60% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
@apostrophecms · formapostrophecms · apostrophe
Related CVEs — apostrophecms apostrophe

In the same product, most dangerous first.

CVE-2026-113658HIGHApostropheCMS: Unauthenticated CSV import requests leave rejected uploads in the system temporary directoryEPSS 0.6%CVE-2026-113711HIGHApostropheCMS: Unauthenticated resource exhaustion via pre-auth aposBigUpload processing in @apostrophecms/import-exportEPSS 0.6%CVE-2026-112953MEDIUMApostropheCMS: Exposure of Sensitive Information via predictable export filenamesEPSS 0.6%CVE-2026-112955MEDIUMApostropheCMS: Import archives can exhaust server storage and deny serviceEPSS 0.5%CVE-2026-33888MEDIUMApostropheCMS: publicApiProjection Bypass via `project` Query Builder in Piece-Type REST APIEPSS 0.5%CVE-2026-113664MEDIUMApostropheCMS import-export tar guard misses './..' because it is a literal '../' substring testEPSS 0.5%
References
https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845cehttps://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f