# 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.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Jun 2026
- **Updated:** 24 Jun 2026
- **Also known as:** BIT-ghost-2026-53949, GHSA-jx35-x7fj-vgpr

## 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.

Weakness: CWE-693 (Protection Mechanism Failure), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-53949?

3 open source packages ship an affected version, including ghost.


| Package | Ecosystem | 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.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53949 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-53949 in the wild and no public exploit code.

Affected packages and fixed versions:
- ghost (Bitnami): affected from 5.46.1; fixed in 6.21.2
- ghost (npm): affected from 5.46.1; fixed in 6.21.2
- ghost (npm): affected from 5.46.1; fixed in 6.21.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-53949/ (Markdown: https://insights.sbomify.com/CVE-2026-53949/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53949
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53949
- OSV: https://osv.dev/vulnerability/CVE-2026-53949

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53949/
Summaries are generated and may contain mistakes; the official description above is the record.