Server-side Request Forgery (SSRF) Affecting ghost package, versions >=6.19.4 <6.21.2
Threat Intelligence
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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- published6 Jul 2026
- disclosed24 Jun 2026
- creditUnknown
Introduced: 24 Jun 2026
NewCVE-2026-53946 (opens in a new tab)How to fix?
Upgrade ghost to version 6.21.2 or higher.
Overview
ghost is a publishing platform
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the populateImageSizes process in ghost/core/core/server/lib/mobiledoc.js. An authenticated staff user can trigger the server to make outbound requests to attacker-chosen image URLs by creating or editing a Mobiledoc image card and causing the post to be re-rendered. When populateImageSizes refetches missing image dimensions, it does so for non-local image URLs without restricting the destination host, allowing requests to internal network services or cloud metadata endpoints. This can leak internal data or other sensitive network responses back into Ghost’s processing path and expose infrastructure reachable only from the server.