SEPTEMBER 15, 2026
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Case File

CVE-2026-87998

HIGH · CVSS 7.1 EPSS 0.27% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-09 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

The Open WebUI platform is vulnerable in versions 0.10.0 to 0.11.1, where a flaw in the DELETE API allows non-administrators with write access to delete critical external connections, potentially disrupting access to dependent knowledge bases. This could lead to significant data loss and service unavailability for users relying on shared configurations. Organizations utilizing Open WebUI, especially those managing sensitive or interconnected knowledge bases, should prioritize upgrading to version 0.11.1 to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-87998
Severity
HIGH
CVSS
7.1
EPSS
0.27%

Original NVD Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, DELETE /api/v1/knowledge/{id}/delete in backend/open_webui/routers/knowledge.py authorized deletion against the knowledge base but then removed its administrator-owned external connection without a separate administrator check or a check for other dependent knowledge bases. A non-administrator with write access to one external knowledge base could delete shared instance configuration and make every other knowledge base using that connection unavailable. This issue is fixed in version 0.11.1.