Timing Attack Affecting apostrophe package, versions <4.29.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-APOSTROPHE-16086059
- published16 Apr 2026
- disclosed15 Apr 2026
- creditrestriction,offset
Introduced: 15 Apr 2026
NewCVE-2026-33877 (opens in a new tab)How to fix?
Upgrade apostrophe to version 4.29.0 or higher.
Overview
apostrophe is a content management system (CMS) for Node.js. It supports in-context editing, schema-driven content types, flexible widgets and a great deal more. This module contains everything necessary to build a website with ApostropheCMS.
Affected versions of this package are vulnerable to Timing Attack via the /api/v1/@apostrophecms/login/reset-request endpoint. An attacker can determine valid usernames or email addresses by measuring response times when submitting password reset requests. Invalid credentials have a fixed 2 second delay before response, while valid ones have no fixed delay duration, so credentials can be enumerated by brute force. This is only exploitable if the passwordReset option is explicitly enabled.