Server-side Request Forgery (SSRF) Affecting apostrophe package, versions <4.31.0
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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Start learning- Snyk IDSNYK-JS-APOSTROPHE-17339210
- published15 Jun 2026
- disclosed12 Jun 2026
- creditSONG JIHOON
Introduced: 12 Jun 2026
NewCVE-2026-53607 (opens in a new tab)How to fix?
Upgrade apostrophe to version 4.31.0 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 Server-side Request Forgery (SSRF) via the pretty-URL handler when the prettyUrls option is enabled. An attacker can cause the server to make blind HTTP requests to internal or external hosts by manipulating the Host header in unauthenticated requests, exposing /uploads/attachments/<cuid>-<slug>.<ext> for a known slug. All further side-channel information disclosure, verbose middleware error reporting, etc. are incidental to this vulnerability.