EUVD-2026-75180
GHSA-4v28-j6q3-5m4r
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
AC:H because exploitation requires attacker-controlled authoritative DNS for rebinding; all other metrics align with the vendor assessment.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
5DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
DNS rebinding SSRF in Open WebUI versions 0.9.6 through 0.11.0 allows authenticated users who control authoritative DNS to bypass hostname validation in SafePlaywrightURLLoader and reach internal services or cloud metadata endpoints. The flaw exists because Python validates the resolved hostname at check time, then the Playwright browser independently re-resolves the same hostname at use time - enabling an attacker to serve a public IP during validation and a private or link-local IP for the actual fetch. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be an authenticated Open WebUI user - any registered account is sufficient (PR:L); unauthenticated exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.7 score with S:C/C:H reflects the genuine potential to reach cloud metadata services or internal APIs that may yield IAM credentials enabling further account compromise beyond the Open WebUI instance itself. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: Open WebUI 0.11.1, available at https://github.com/open-webui/open-webui/releases/tag/v0.11.1; the corresponding code fix is commit 27402ff. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Open WebUI deployments and document current versions in use. …
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