CVE-2026-32731
CVE-2026-32731 · ApostropheCMS has Arbitrary File Write (Zip Slip / Path Traversal) in Import-Export Gzip Extraction
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 10.0 · Critical · EPSS 0.6% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
import-export
- Versions
- < 3.5.3: Affected
No fix published
@apostrophecms/import-export npm
- Affected ranges
- SEMVER: < 3.5.3
Update to 3.5.3