Vulnerability · Published Jun 24, 2026 · Assigned by GitHub_M
CVE-2026-53949Ghost Content API filter bypass reveals private fields
Medium 5.3
In plain English
A medium-severity information exposure in Ghost from TryGhost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Ghost is a Node.js content management system. From 5.46.1 until 6.21.2, the validation applied to filters on the public API endpoints could be partially bypassed, making it possible to reveal private fields via a brute force attack. If SQLite was used as the database password hashes were fully accessible. If MySQL was used as the database the password hashes' case (uppercase / lowercase) would have been lost, which would likely have rendered a further brute force attack on the discovered hashes fruitless. This vulnerability is fixed in 6.21.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | ghost | 6.21.2 | GHSA-jx35-x7fj-vgpr |
Affected products (as reported)
Weakness: CWE-200, CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-jx35-x7fj-vgpr x_refsource_CONFIRM