CVE-2026-113711highCWE-400CWE-770

CVE-2026-113711: high-severity vulnerability in apostrophecms apostrophe

ApostropheCMS: Unauthenticated resource exhaustion via pre-auth aposBigUpload processing in @apostrophecms/import-export

Published

21Vexday Risk Score

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

ssvc Trackcvss 7.5epss 0.6%
exploitation probability
0.6%top 53% of all CVEs
observed exploitation
nono source reports it
ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0 of ApostropheCMS and 3.7.0 of the import-export module, import routes invoke bigUploadMiddleware without an early authorize callback, allowing unauthenticated requests to perform upload initialization, chunk storage, temporary processing, and attacker-declared cleanup work before the later user check rejects the import. This issue is fixed in ApostropheCMS 4.33.0 and import-export 3.7.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
@apostrophecms · import-exportapostrophecms · 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-2026-112953MEDIUMApostropheCMS: 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%CVE-2026-113656MEDIUMApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoSEPSS 0.5%
References
https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845cehttps://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-86wm-68pq-5jwq