CVE-2026-53949 Ghost Content API filter bypass reveals private fields
Attackers can bypass API filters to reveal private fields and potentially access password hashes, compromising user data in Ghost CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53949?
CVE-2026-53949 is a medium-severity vulnerability in TryGhost Ghost, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-53949?
3 open source packages ship an affected version, including ghost.
| Package | Affected | Fixed in |
|---|---|---|
ghost Bitnami | From 5.46.1 | 6.21.2 |
ghost npm | From 5.46.1 | 6.21.2 |
ghost npm | From 5.46.1 | 6.21.2 |
How do I fix CVE-2026-53949?
Upgrade ghost to 6.21.2 or later.
Is CVE-2026-53949 being exploited?
There is no known exploitation of CVE-2026-53949 in the wild and no public exploit code.
Sources
Also known as BIT-ghost-2026-53949, GHSA-jx35-x7fj-vgpr.