CVE-2026-87996 PUBLISHED

Open WebUI: SSRF into internal services via DNS rebinding in the Playwright web loader

Assigner: GitHub_M
Reserved: 09.09.2026 Published: 09.09.2026 Updated: 09.09.2026

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.1, SafePlaywrightURLLoader in backend/open_webui/retrieval/web/utils.py validated a user-controlled hostname in Python and then let the Playwright browser resolve it again in the sync and async request interceptors. An authenticated user controlling authoritative DNS could return a public address to validation and an internal address to the browser, exposing responses from internal services or cloud metadata through web search or URL ingestion. This issue is fixed in version 0.11.1.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS Score: 7.7

Product Status

Vendor open-webui
Product open-webui
Versions
  • Version >= 0.9.6, < 0.11.1 is affected

References

Problem Types

  • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition CWE
  • CWE-918: Server-Side Request Forgery (SSRF) CWE