CVE-2026-70589: Ghost: Archived Offers can be Redeemed
Impact
A missing validation check allowed users to redeem subscription offers that were no longer active.
Vulnerable versions
This vulnerability is present in Ghost from v4.22.0 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 Pedro Pinho 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 From 4.22.0 until 6.54.1, a missing validation check allowed users to redeem subscription offers that were no longer active. 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-2026-70589?
The severity of CVE-2026-70589 is medium, rated at 4.8.
What impact does CVE-2026-70589 have?
CVE-2026-70589 allows users to redeem subscription offers that are no longer active due to a missing validation check.
How can I fix CVE-2026-70589?
To fix CVE-2026-70589, update your Ghost installation to version 6.54.1 or later.
Which versions of Ghost are vulnerable to CVE-2026-70589?
CVE-2026-70589 affects Ghost versions from 4.22.0 up to 6.54.0.
What is the nature of the vulnerability in CVE-2026-70589?
CVE-2026-70589 is categorized under Input Validation due to the lack of validation checks.