CVE-2026-70588: Ghost: Cross-Site Scripting in Universal Import
Impact
The Universal Import feature in Ghost Admin failed to properly sanitize imported content resulting in XSS in post content.
Vulnerable versions
This vulnerability is present in Ghost from v5.26.0 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.
Workarounds
If upgrading immediately is not possible, avoid using the Universal Import feature.
References
Ghost thanks meifukun for disclosing this vulnerability responsibly.
For more information
If you have any questions or comments about this advisory, email us at security@ghost.org.
Other sources
Ghost is a Node.js content management system. From 5.26.0 until 6.54.1, the Universal Import feature in Ghost Admin failed to properly sanitize imported content resulting in XSS in post content. 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 - Configuration
If upgrading immediately is not possible, avoid using the Universal Import feature in Ghost Admin because it fails to properly sanitize imported content and can result in XSS in post content (v5.26.0 through v6.54.0).
Ghost Admin (Universal Import feature) Universal Import usage = Avoid using the Universal Import feature
Event History
Frequently Asked Questions
What is the severity of CVE-2026-70588?
The severity of CVE-2026-70588 is medium, rated at 5 on the CVSS scale.
How do I fix CVE-2026-70588?
To fix CVE-2026-70588, upgrade Ghost to version 6.54.1 or later.
What type of vulnerability is CVE-2026-70588?
CVE-2026-70588 is a Cross-Site Scripting (XSS) vulnerability found in the Universal Import feature of Ghost.
What versions of Ghost are affected by CVE-2026-70588?
CVE-2026-70588 affects versions of Ghost from 5.26.0 until 6.54.1.
Is the issue described in CVE-2026-70588 fully resolved?
Yes, the issue described in CVE-2026-70588 has been fully resolved in Ghost version 6.54.1.