# CVE-2024-7983: Denial of Service in open-webui/open-webui

> An unauthenticated attacker can cause a denial of service in Open WebUI by sending a malicious markdown payload to an exposed conversion endpoint.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 20 Mar 2025
- **Updated:** 15 Oct 2025
- **Also known as:** GHSA-5v9m-57mq-qc75, PYSEC-2026-1723

## What is CVE-2024-7983?

CVE-2024-7983 is a high-severity denial of service vulnerability in Openwebui Open Webui, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In version 0.3.8 of open-webui, an endpoint for converting markdown to HTML is exposed without authentication. A maliciously crafted markdown payload can cause the server to spend excessive time converting it, leading to a denial of service. The server becomes unresponsive to other requests until the conversion is complete.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2024-7983?

3 open source packages ship an affected version, including open-webui. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `open-webui` | PyPI | All versions to 0.3.8 | None |
| `open-webui` | PyPI | All versions to 0.3.8 | None |
| `open-webui` | PyPI | All versions | 0.5.13 |

Products: Openwebui Open Webui.

## How do I fix CVE-2024-7983?

Upgrade open-webui to 0.5.13 or later.

## Is CVE-2024-7983 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-7983 exists.

## Other vulnerabilities in Openwebui Open Webui

- [CVE-2026-44551](https://insights.sbomify.com/CVE-2026-44551/): Open WebUI: LDAP Empty Password Authentication Bypass (critical 9.1)
- [CVE-2026-56400](https://insights.sbomify.com/CVE-2026-56400/): open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation (critical 9.0)
- [CVE-2024-8017](https://insights.sbomify.com/CVE-2024-8017/): Cross-site Scripting (XSS) in open-webui/open-webui (critical 9.0)
- [CVE-2026-45672](https://insights.sbomify.com/CVE-2026-45672/): Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed (high 8.8)
- [CVE-2026-87995](https://insights.sbomify.com/CVE-2026-87995/): Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-7983 and fix it if it is affected.

What it is: CVE-2024-7983 is a high-severity denial of service vulnerability in Openwebui Open Webui, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-7983 exists.

Affected packages and fixed versions:
- open-webui (PyPI): affected all versions up to 0.3.8; no fix listed
- open-webui (PyPI): affected all versions up to 0.3.8; no fix listed
- open-webui (PyPI): affected all versions; fixed in 0.5.13

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-2024-7983/ (Markdown: https://insights.sbomify.com/CVE-2024-7983/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-7983
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-7983
- OSV: https://osv.dev/vulnerability/CVE-2024-7983

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-7983/
Summaries are generated and may contain mistakes; the official description above is the record.