PT-2026-26159 · Apostrophecms · Import-Export

Published 2026-03-18 · Updated 2026-03-18 · CVE-2026-32731

NVD

CVSS v3.1

9.9

Critical

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

ApostropheCMS is an open-source content management framework. Prior to version 3.5.3 of @apostrophecms/import-export, The extract() function in gzip.js constructs file-write paths using fs.createWriteStream(path.join(exportPath, header.name)). path.join() does not resolve or sanitise traversal segments such as ../. It concatenates them as-is, meaning a tar entry named ../../evil.js resolves to a path outside the intended extraction directory. No canonical-path check is performed before the write stream is opened. This is a textbook Zip Slip vulnerability. Any user who has been granted the Global Content Modify permission — a role routinely assigned to content editors and site managers — can upload a crafted .tar.gz file through the standard CMS import UI and write attacker-controlled content to any path the Node.js process can reach on the host filesystem. Version 3.5.3 of @apostrophecms/import-export fixes the issue.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-32731

Affected Products

Import-Export

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-32731 · Security Note
• https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-mwxc-m426-3f78 · Note
• https://reddit.com/r/apostrophecms/comments/1rxced8/apostrophe_4280_static_builds_for_astro_pretty · Reddit Post