CVE-2026-70591: Ghost: Server-Side Request Forgery in Image Fetching
Impact
A Server-Side Request Forgery (SSRF) in Ghost Admin allowed any staff-level user to perform a blind HTTP GET request against internal hosts. No output was returned, but this could have been used to probe open ports on internal hosts.
Vulnerable versions
This vulnerability is present in Ghost from v0.10.0 up to v6.54.0.
Patches
v6.54.1 contains a fix for this issue.
How to update
For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.
If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.
References
Ghost thanks Younghun Ko, vx77, and Miguel Segovia Gil for disclosing this vulnerability responsibly.
For more information
If you have any questions or comments about this advisory, email Ghost at security@ghost.org.
Other sources
Ghost is a Node.js content management system. From 0.10.0 until 6.54.1, a Server-Side Request Forgery in Ghost Admin image fetching allowed any staff-level user to perform a blind HTTP GET request against internal hosts. No output was returned, but this could have been used to probe open ports on internal hosts. This issue is fixed in version 6.54.1.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
npm/ghostto a version that resolves this vulnerability.Fixed in 6.54.1 - Upgrade
Upgrade
Ghostto a version that resolves this vulnerability.Fixed in 6.54.1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-70591?
CVE-2026-70591 has a medium severity rating of 4.1.
How do I fix CVE-2026-70591?
To remediate CVE-2026-70591, upgrade to Ghost version 6.54.1 or later.
What type of vulnerability is CVE-2026-70591?
CVE-2026-70591 is classified as a Server-Side Request Forgery (SSRF) vulnerability.
Who is affected by CVE-2026-70591?
CVE-2026-70591 affects staff-level users of the Ghost Admin interface on vulnerable versions.
What is the impact of CVE-2026-70591?
The impact of CVE-2026-70591 allows an attacker to perform blind HTTP GET requests against internal hosts, potentially probing for open ports.