MEDIUM 5.4 GitHub
CVE-2026-53946
Ghost: Mobiledoc image-size fetch SSRF
### Impact
When re-rendering posts, Ghost would refetch missing image dimensions by issuing an outbound HTTP request to the URL stored on an image card — without restricting that URL to trusted image hosts. An authenticated staff user able to create or edit posts could therefore point an image card at an attacker-chosen host and cause the Ghost server to request it on their behalf, including hosts on internal networks or cloud instance metadata endpoints that would not normally be reachable fro
Affected Products
- npm/ghost >= 6.19.4, < 6.21.1
References
- https://github.com/advisories/GHSA-g366-23fw-ggp6
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-g366-23fw-ggp6
- https://nvd.nist.gov/vuln/detail/CVE-2026-53946
- https://github.com/TryGhost/Ghost/pull/26753
This medium severity vulnerability with a CVSS score of 5.4 was published on 2026-08-04 via GitHub. Affected: npm/ghost >= 6.19.4, < 6.21.1.
vulnfeed aggregates 9182 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.