What is CVE-2026-112956?

CVE-2026-112956 is a medium-severity vulnerability in @Apostrophecms Mport-Export, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-10-20.

How severe is CVE-2026-112956?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in @Apostrophecms Mport-Export

CVE-2026-112956

ApostropheCMS is an open-source Node.js content management system. Prior to 3.7.1 of the import-export module, duplicate-import continuation accepts client-controlled replacement choices without binding them to a user-owned server-side analysis or authorizing the canonical target. On an import-enabled localized type, a contributor with draft editing authority can cross the publication boundary by selecting a published document for replacement, although the current assessment is based on remediation review rather than a repeated end-to-end reproduction. This issue is fixed in version 3.7.1.

Vulnerability class: Broken Access Control

Published 2026-10-20.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

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 Mport-Export — versions < 3.7.1
Apostrophecms Apostrophe — versions < 4.34.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

Frequently asked questions

What is CVE-2026-112956?: CVE-2026-112956 is a medium-severity vulnerability in @Apostrophecms Mport-Export, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-10-20.
How severe is CVE-2026-112956?: Medium severity. CVSS v3 base score is 6.5 out of 10.