Server-side Request Forgery (SSRF) Affecting ghost package, versions >=0.10.0-rc1 <6.54.1
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Server-side Request Forgery (SSRF) vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-JS-GHOST-18610058
- published11 Aug 2026
- disclosed4 Aug 2026
- creditYounghun Ko, vx77, Miguel Segovia Gil
Introduced: 4 Aug 2026
NewCVE-2026-70591 (opens in a new tab)How to fix?
Upgrade ghost to version 6.54.1 or higher.
Overview
ghost is a publishing platform
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the ImageSize._fetchImageSizeFromUrl path in core/server/lib/image/image-size.js. An attacker can make Ghost send blind HTTP GET requests to internal hosts by supplying an external image URL that is fetched for image-size detection. This lets a staff-level user probe internal services and open ports from the Ghost server, with no response body returned to the attacker.
Notes
- Staff-level access in Ghost Admin is required; the vulnerable image-size lookup is reachable through the admin-side image handling flow rather than public site requests.