EUVD-2026-75184
GHSA-34r3-9m95-vq73
Severity by source
AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
Azure-deployment-specific reachability raises AC:H; authenticated low-privilege user required (PR:L); scope changes to Azure platform infrastructure (S:C); confidentiality high for metadata/tokens, integrity low for triggering fetches.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
6DescriptionCVE.org
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Python's globally routable address classification as proof that a destination was external. An authenticated user could make an Azure-hosted instance fetch and return content from 168.63.129.16, the Azure platform channel, as well as other reserved ranges that the standard classification did not reject. This issue is fixed in version 0.11.1.
Articles & Coverage 1
AnalysisAI
Server-side request forgery in Open WebUI prior to 0.11.1 allows authenticated users to reach internal cloud infrastructure by exploiting gaps in Python's is_global address classification. The web retrieval endpoints POST /api/v1/retrieval/process/web and /process/web/search relied solely on Python's built-in global-address check, which does not reject the Azure platform channel IP (168.63.129.16) or other reserved ranges such as multicast, 6to4 relay, NAT64, IPv6 site-local, and embedded-IPv4 representations. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a valid Open WebUI user account (any role; PR:L in CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.1 with vector AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N is well-calibrated. … 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 | Upgrade to Open WebUI version 0.11.1 or later, which adds an explicit IP deny list covering 168.63.129.16 and related reserved ranges, plus IPv6-embedded-IPv4 detection. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Open WebUI instances in production and determine their versions, prioritizing Azure-hosted deployments. …
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External POC / Exploit Code
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