CVE-2026-70593 Ghost: Theme Upload Path Traversal
A staff user can exploit path traversal in custom theme uploads to write files outside the intended directory, potentially altering installation behavior.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-70593?
CVE-2026-70593 is a medium-severity path traversal vulnerability in TryGhost Ghost, published on 4 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Ghost is a Node.js content management system. From 0.10.0 until 6.54.1, a vulnerability in custom themes allowed a staff user to write files outside of the uploads directory. This could be used to alter the behavior of the installation through custom theme upload path traversal in LocalStorageBase and theme storage name handling. This issue is fixed in version 6.54.1.
Weakness: CWE-22
Which versions are affected by CVE-2026-70593?
3 open source packages ship an affected version, including ghost.
| Package | Affected | Fixed in |
|---|---|---|
ghost Bitnami | From 0.10.0 | 6.54.1 |
ghost npm | From 0.10.0 | 6.54.1 |
ghost npm | From 0.10.0 | 6.54.1 |
How do I fix CVE-2026-70593?
Upgrade ghost to 6.54.1 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-70593 being exploited?
There is no known exploitation of CVE-2026-70593 in the wild and no public exploit code.
Sources
Also known as BIT-ghost-2026-70593, GHSA-cjc9-q5gf-327p.