# CVE-2026-55421: Open edX Platform: SSRF in Studio Video Download Endpoint

> Attackers can exploit a Server-Side Request Forgery vulnerability in the Studio Video Download endpoint to fetch internal resources and exfiltrate data.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Sep 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-fpf9-9rpr-jvrx

## What is CVE-2026-55421?

CVE-2026-55421 is a medium-severity server-side request forgery vulnerability in openedx-platform, published on 2 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Open edX Platform enables the authoring and delivery of online learning at any scale. Prior to commit 00b7c3c, the endpoint accepts user-supplied files[].url, performs a server-side fetch using "requests.get(url, allow_redirects=True)". The fetched bytes are then returned inside a ZIP response. This enables SSRF with response exfiltration. Redirect-following is enabled, and there is no timeout in the vulnerable fetch path. This issue has been patched via commit 00b7c3c.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-55421?


## How do I fix CVE-2026-55421?

No fix has been published for CVE-2026-55421 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-55421 being exploited?

There is no known exploitation of CVE-2026-55421 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55421 and fix it if it is affected.

What it is: CVE-2026-55421 is a medium-severity server-side request forgery vulnerability in openedx-platform, published on 2 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-55421 in the wild and no public exploit code.

Affected product: openedx-platform. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-55421/ (Markdown: https://insights.sbomify.com/CVE-2026-55421/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55421
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55421
- OSV: https://osv.dev/vulnerability/CVE-2026-55421

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-55421/
Summaries are generated and may contain mistakes; the official description above is the record.