CVE-2026-103266
High
Description
Ghost versions 5.2.0 through versions prior to 6.62.0 allow a remote attacker, without authentication, to abuse the Stripe Checkout flow to attach a paid subscription to an existing member, modify that member's name, and inject content into newsletters sent to the member. Depending on the recipient's email client, the injected content may be rendered, resulting in HTML injection or cross-site scripting (XSS).
SeverityHigh
CVSS7.1
Exploit probability—
Product
Ghost
PublishedOct 1, 2026
First seenOct 1, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- TryGhost Ghost6.62.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| TryGhost Ghost | 5.2.0 ≤ v < 6.62.0 | 6.62.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.