CVE-2026-87996CWE-367CWE-918ssrf

CVE-2026-87996

High · published September 10, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
27.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00354 · 27.9th percentile
Weaknesses
CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-09-10T02:18Z
Affected products (1)
ProductVersionsFixed in
openwebui/open_webui≥ 0.9.6, < 0.11.10.11.1
References (5)
https://github.com/open-webui/open-webui/commit/27402ff210bfa253445720920dfb86b15a00327b · [email protected]https://github.com/open-webui/open-webui/pull/28634 · [email protected]https://github.com/open-webui/open-webui/releases/tag/v0.11.1 · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-4v28-j6q3-5m4r · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-4v28-j6q3-5m4r · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 11 SEP 03:19Z
    EPSS moved — → 0%
    epss
  • 09 SEP 21:28Z
    Open WebUI: SSRF into internal services via DNS rebinding in the Playwright web loader
    cvelistv5