# 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.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Oct 2026
- **Updated:** 6 Oct 2026
- **Also known as:** BIT-ghost-2026-103291, GHSA-rrq6-9r3c-7w26, GHSA-x8f4-ghf2-wcmp

## 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 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-103291?

1 open source package ship an affected version, including ghost.


| Package | Ecosystem | 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.

## Is CVE-2026-103291 being exploited?

There is no known exploitation of CVE-2026-103291 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-103291 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-103291 in the wild and no public exploit code.

Affected packages and fixed versions:
- ghost (Bitnami): affected from 3.20.2; fixed in 6.51.0

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-2026-103291/ (Markdown: https://insights.sbomify.com/CVE-2026-103291/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-103291
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-103291
- OSV: https://osv.dev/vulnerability/CVE-2026-103291

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-103291/
Summaries are generated and may contain mistakes; the official description above is the record.