CVE-2026-112953: ApostropheCMS predictable export archive filename information disclosure

CVE-2026-112953 · Severity: medium · CVSS 4 · Published 2026-10-20

ApostropheCMS is an open-source Node.js content management system used to build and manage websites. An attacker who knows or can predict export archive filenames can download another user's exported content without authentication if the exports are stored in publicly readable storage. This allows unauthorized access to sensitive site data before the archive expires or is cleaned up.

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

Quick answers

Is CVE-2026-112953 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-112953 being exploited in the wild.
How severe is CVE-2026-112953?
Medium severity, with a CVSS score of 4, published 20 October 2026.
Which products and versions are affected?
ApostropheCMS Apostrophe before 3.7.1; @apostrophecms/import-export (npm) < 3.7.1, SEMVER:introduced=0,fixed=3.7.1.
Is there a fix for CVE-2026-112953?
Yes. @apostrophecms/import-export (npm): upgrade to 3.7.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-112953 attacked?
It is attacked over the network.
Am I affected by CVE-2026-112953?
Check whether you run ApostropheCMS Apostrophe 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 3.7.1 or later
    npm install @apostrophecms/import-export@3.7.1

Technical details

The import-export module prior to version 3.7.1 generates predictable export archive filenames, allowing unauthenticated attackers to enumerate and retrieve exported archives from publicly accessible export storage. Exploitation requires that a user with export permission first create an archive, and the attack is prevented if exports are disabled, upload storage is private, or upload delivery requires authentication. The vulnerability is an information disclosure via predictable resource identifiers.

Affected products

  • ApostropheCMS Apostrophe before 3.7.1

Identifiers

  • CVE-2026-112953
  • GHSA-5gc8-frw3-3vqm

Timeline

  • 2026-10-20: disclosed
  • 2026-10-14: patched

References

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