High 7.5Published Oct 20, 2026

CVE-2026-113711ApostropheCMS: Unauthenticated resource exhaustion via pre-auth aposBigUpload processing in @apostrophecms/import-export

Updated under an hour ago (Oct 28, 2026, 7:00 AM ET)

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It affects apostrophecms apostrophe and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.56%, higher than 46% of scored CVEs.

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Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.56% (percentile 46)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 20, 2026
First seen by InfoSec Signals: Oct 20, 2026

Affected products

Affected products

apostrophecms apostrophe apostrophecms:apostrophe (from the name)	before 4.33.0	CNA record
@apostrophecms import-export apostrophecms:import_export (from the name)	before 3.7.0	CNA record

References

References

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-86wm-68pq-5jwq	x-refsource-confirm
https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce	x-refsource-misc
https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350	x-refsource-misc
https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.