CVE-2026-103278 Ghost 5.8.0 before 6.34.0 Staff Account Takeover via Admin iframe
Attackers with publishing privileges can take over staff accounts via malicious pages in the admin iframe due to input validation flaws.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-103278?
CVE-2026-103278 is a high-severity cross-site scripting vulnerability in TryGhost Ghost, published on 1 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Ghost versions 5.8.0 before 6.34.0 contain an input validation vulnerability in the admin iframe that allows attackers to take over staff user accounts. Attackers with content publishing privileges can craft malicious pages that, when visited by active staff users, enable account takeover through improper input validation.
Weakness: CWE-23
Which versions are affected by CVE-2026-103278?
1 open source package ship an affected version, including ghost.
| Package | Affected | Fixed in |
|---|---|---|
ghost Bitnami | From 5.8.0 | 6.34.0 |
How do I fix CVE-2026-103278?
Upgrade ghost to 6.34.0 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-103278 being exploited?
There is no known exploitation of CVE-2026-103278 in the wild and no public exploit code.
Sources
Also known as BIT-ghost-2026-103278, GHSA-5pxf-whwv-g54g, GHSA-72jh-g5rp-326j.