CVE-2026-103291 Ghost 3.20.2 before 6.51.0 SSRF via image-size fetch
Authenticated staff users can trigger SSRF in Ghost to access internal network resources and metadata services via image dimension refetching.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-103291?
CVE-2026-103291 is a medium-severity server-side request forgery vulnerability in TryGhost Ghost, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Ghost versions from 3.20.2 before 6.51.0 contain a server-side request forgery vulnerability in image dimension refetching that allows authenticated staff users to trigger outbound HTTP requests to arbitrary URLs. Attackers can point image cards at attacker-controlled hosts or internal network endpoints to access metadata services and internal resources unavailable from the public internet.
Weakness: CWE-918
Which versions are affected by CVE-2026-103291?
1 open source package ship an affected version, including ghost.
| Package | Affected | Fixed in |
|---|---|---|
ghost Bitnami | From 3.20.2 | 6.51.0 |
How do I fix CVE-2026-103291?
Upgrade ghost to 6.51.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-103291 being exploited?
There is no known exploitation of CVE-2026-103291 in the wild and no public exploit code.
Sources
Also known as BIT-ghost-2026-103291, GHSA-rrq6-9r3c-7w26, GHSA-x8f4-ghf2-wcmp.