critical9.4Public exploit code

CVE-2026-26980

Ghost has a SQL injection in Content API

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

Ghost CMS 6.19.0 - SQLi2026-05-07 · webapps · multiple

Impact

### Impact A SQL injection vulnerability existed in Ghost's Content API that allowed unauthenticated attackers to read arbitrary data from the database. ### Vulnerable Versions This vulnerability is present in Ghost v3.24.0 to v6.19.0. ### Patches v6.19.1 contains a fix for this issue. **Note:** as this vulnerability lets an attacker gain access to a site's API keys, we recommend reviewing staff users and rotating keys. We generally recommend always updating Ghost to its most current version. ### Workarounds There is no application-level workaround. The Content API key is public by design, so restricting key access does not mitigate this vulnerability. As a temporary mitigation, a reverse proxy or WAF rule can be used to block Content API requests containing `slug%3A%5B` or `slug:[` in the query string filter parameter. Note that this may break legitimate slug filter functionality. ### References We thank Nicholas Carlini using Claude, Anthropic for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email us at [security@ghost.org](mailto:security@ghost.org).

Affected packages

Ecosystem	Package	Affected	Fixed in
npm	`ghost`	>= 3.24.0, < 6.19.1	6.19.1

Affected products

Vendor	Product	Affected versions
Ghost	Ghost	from 3.24.0 before 6.19.1

Weakness classification

CWE-89