Is CVE-2026-113664 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-113664 being exploited in the wild.

How severe is CVE-2026-113664?

Medium severity, with a CVSS score of 4, published 20 October 2026.

Which products and versions are affected?

ApostropheCMS Import-Export 3.6.2 and prior; @apostrophecms/import-export (npm) < 3.7.0, SEMVER:introduced=0,fixed=3.7.0.

How is CVE-2026-113664 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-113664?

Check whether you run ApostropheCMS Import-Export or @apostrophecms/import-export (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-113664: ApostropheCMS import-export tar path traversal and crash

Q: Is there a fix for CVE-2026-113664?

Yes. @apostrophecms/import-export (npm): upgrade to 3.7.0 or later. Until then: Restrict upload permissions to trusted administrators only, or disable the import-export feature if it is not in active use, until a patch is applied. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-113664 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-113664?

Check whether you run ApostropheCMS Import-Export or @apostrophecms/import-export (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-113664 · Severity: medium · CVSS 4 · Published 2026-10-20

ApostropheCMS is a content management system that includes an import-export module for uploading and processing archives. An authenticated user can upload a specially crafted archive that bypasses path validation and crashes the Node.js process, causing a denial of service that affects the application server and all workers handling that upload.

Technologies: ApostropheCMS Import-Export, @apostrophecms/import-export (npm). Vendors: ApostropheCMS, npm.

Quick answers

Is CVE-2026-113664 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-113664 being exploited in the wild.
How severe is CVE-2026-113664?: Medium severity, with a CVSS score of 4, published 20 October 2026.
Which products and versions are affected?: ApostropheCMS Import-Export 3.6.2 and prior; @apostrophecms/import-export (npm) < 3.7.0, SEMVER:introduced=0,fixed=3.7.0.
Is there a fix for CVE-2026-113664?: Yes. @apostrophecms/import-export (npm): upgrade to 3.7.0 or later. Until then: Restrict upload permissions to trusted administrators only, or disable the import-export feature if it is not in active use, until a patch is applied. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-113664 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-113664?: Check whether you run ApostropheCMS Import-Export or @apostrophecms/import-export (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

@apostrophecms/import-export (npm): upgrade to 3.7.0 or later
```
npm install @apostrophecms/import-export@3.7.0
```

Restrict upload permissions to trusted administrators only, or disable the import-export feature if it is not in active use, until a patch is applied.

Technical details

The tar-extraction guard in `packages/import-export/lib/formats/gzip.js` uses a literal substring test for `../` to detect path traversal, which misses entries like `./..` that normalize to parent directories via `path.join()`. Additionally, the `fs.WriteStream` lacks an error handler, so attempting to write to an existing directory emits an unhandled `'error'` event that terminates the Node process. An authenticated user with import privileges can trigger both conditions by uploading a malicious gzip archive.

Affected products

ApostropheCMS import-export 3.6.2 and prior

Identifiers

CVE-2026-113664
GHSA-97wv-p4xx-c7mg

Timeline

2026-10-20: disclosed

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.