MEDIUM 4.8 GitHub
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A missing validation check allowed users to redeem subscription offers that were no longer active.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](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost).
Affected Products
- npm/ghost >= 4.22.0, < 6.54.1
References
- https://github.com/advisories/GHSA-4wx2-7gvj-qfq3
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-4wx2-7gvj-qfq3
- https://github.com/TryGhost/Ghost/commit/d91c0fc52dfc987d71a9803dbcbe6447d21b92fb
- https://github.com/advisories/GHSA-4wx2-7gvj-qfq3
This medium severity vulnerability with a CVSS score of 4.8 was published on 2026-08-04 via GitHub. Affected: npm/ghost >= 4.22.0, < 6.54.1.
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