Is CVE-2026-113658 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-113658 being exploited in the wild.

How severe is CVE-2026-113658?

High severity, with a CVSS score of 7.5, published 20 October 2026.

Which products and versions are affected?

ApostropheCMS Apostrophe before 4.33.0; apostrophe (npm) < 4.33.0, SEMVER:introduced=0,fixed=4.33.0.

Is there a fix for CVE-2026-113658?

Yes. apostrophe (npm): upgrade to 4.33.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-113658 attacked?

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

Am I affected by CVE-2026-113658?

Check whether you run ApostropheCMS Apostrophe or apostrophe (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-2026-113658: ApostropheCMS unauthenticated CSV upload denial of service

Q: Is there a fix for CVE-2026-113658?

Yes. apostrophe (npm): upgrade to 4.33.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-113658 attacked?

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

Q: Am I affected by CVE-2026-113658?

Check whether you run ApostropheCMS Apostrophe or apostrophe (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-2026-113658 · Severity: high · CVSS 7.5 · Published 2026-10-20

ApostropheCMS is a Node.js-based content management system used to build and manage websites. An attacker can repeatedly upload large files to a public CSV conversion route without authentication, causing rejected uploads to accumulate in the temporary directory and consume all available disk space. This disruption affects not only the CMS itself but potentially other services sharing the same server partition, causing system outages.

Technologies: ApostropheCMS Apostrophe, apostrophe (npm). Vendors: ApostropheCMS, npm.

Quick answers

Is CVE-2026-113658 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-113658 being exploited in the wild.
How severe is CVE-2026-113658?: High severity, with a CVSS score of 7.5, published 20 October 2026.
Which products and versions are affected?: ApostropheCMS Apostrophe before 4.33.0; apostrophe (npm) < 4.33.0, SEMVER:introduced=0,fixed=4.33.0.
Is there a fix for CVE-2026-113658?: Yes. apostrophe (npm): upgrade to 4.33.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-113658 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-113658?: Check whether you run ApostropheCMS Apostrophe or apostrophe (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

apostrophe (npm): upgrade to 4.33.0 or later
```
npm install apostrophe@4.33.0
```

Technical details

A public, unauthenticated Rich Text CSV conversion route accepts multipart uploads and writes them to the system temporary directory before validating the file extension. When validation fails, the staged file is not cleaned up, allowing repeated large rejected uploads to exhaust temporary-disk capacity. The vulnerability requires only a valid CSRF cookie available to public users, with no authentication needed.

Affected products

ApostropheCMS Apostrophe before 4.33.0

Identifiers

CVE-2026-113658
GHSA-qhcq-9pm2-c9w9

Timeline

2026-10-20: disclosed
2026-09-30: patched

References

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