2026-07 .NET 8.0.29 Security Update for x86 Client (KB5104032)

2026-07 .NET 8.0.29 Security Update for x86 Client KB5104032...

2026-07 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5099535)

2026-07 Cumulative Update for Windows Server 2016 for x64-based Systems KB5099535...

2026-07 Cumulative Update for Windows 10 Version 1809 for x86-based Systems (KB5099538)

2026-07 Cumulative Update for Windows 10 Version 1809 for x86-based Systems KB5099538...

2026-07 Cumulative Update for Windows 10 Version 22H2 for x86-based Systems (KB5099539)

2026-07 Cumulative Update for Windows 10 Version 22H2 for x86-based Systems KB5099539...

2026-07 Cumulative Update for Windows 10 Version 1809 for x64-based Systems (KB5099538)

2026-07 Cumulative Update for Windows 10 Version 1809 for x64-based Systems KB5099538...

Security Bulletin: Langflow is affected by remote code execution, denial of service, path traversal, and exposed credentials due to multiple unauthenticated and insufficiently authorized API endpoints

Summary Langflow provides a visual interface for constructing and executing AI-powered agent workflows, exposing HTTP API endpoints for flow execution, file management, vector store operations, and Model Context Protocol MCP server configuration. An attacker could exploit insufficient validation...

July 14, 2026—KB5099538 (OS Build 17763.9020)

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Description of the security update for Office 2016: July 14, 2026 (KB5002273)

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July 14, 2026—KB5099444 (Monthly Rollup)

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July 14, 2026—KB5099414 (OS Build 22631.7376)

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July 14, 2026-Security and Quality Rollup for .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Server 2012 (KB5100990)

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PYSEC-2026-2750 Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode

RAG ACL Bypass in Milvus Multitenancy Mode Summary This is a bypass of the fix for: - GHSA-h36f-rqpx-j5wx - CVE-2026-44560 - "Unauthorized File and Knowledge Base Content Access via RAG Vector Search" Open WebUI added collection-level ACL checks, but the patch can still be bypassed when Milvus...

Open WebUI BOLA: `search_knowledge_files` Allows Unauthorized Knowledge Base File Enumeration

SummaryOpen WebUI has a Broken Object Level Authorization BOLA vulnerability in the builtin searchknowledgefiles tool.When native function calling is enabled and the selected model has no attached knowledge bases, an authenticated user can call searchknowledgefiles with an arbitrary knowledgeid...

PYSEC-2026-2721 Open WebUI BOLA: `search_knowledge_files` Allows Unauthorized Knowledge Base File Enumeration

Summary Open WebUI has a Broken Object Level Authorization BOLA vulnerability in the builtin searchknowledgefiles tool. When native function calling is enabled and the selected model has no attached knowledge bases, an authenticated user can call searchknowledgefiles with an arbitrary knowledgeid...

Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode

RAG ACL Bypass in Milvus Multitenancy Mode SummaryThis is a bypass of the fix for:- GHSA-h36f-rqpx-j5wx- CVE-2026-44560- "Unauthorized File and Knowledge Base Content Access via RAG Vector Search"Open WebUI added collection-level ACL checks, but the patch can still be bypassed when Milvus...

PYSEC-2026-2752 Open WebUI: Cross-User File Access via Unchecked file_id in Folder Knowledge and Knowledge-Base Attach Endpoints

Cross-User File Access via Unchecked fileid in Folder Knowledge and Knowledge-Base Attach Endpoints Summary Multiple endpoints accept a user-supplied fileid and attach the referenced file to a resource the caller controls folder knowledge, knowledge-base contents without verifying that the caller...

Open WebUI Vulnerable to IDOR: Retrieval API Bypasses Knowledge Base Access Controls

IDOR: Retrieval API Bypasses Knowledge Base Access ControlsAuthor: Andrew Orr Summaryvalidatecollectionaccess PR 22109 checks the user-memory- and file- collection name prefixes but does not check knowledge base collections, which use raw UUIDs as collection names. Any authenticated user who know...

Open WebUI: Cross-User File Access via Unchecked file_id in Folder Knowledge and Knowledge-Base Attach Endpoints

Cross-User File Access via Unchecked fileid in Folder Knowledge and Knowledge-Base Attach Endpoints SummaryMultiple endpoints accept a user-supplied fileid and attach the referenced file to a resource the caller controls folder knowledge, knowledge-base contents without verifying that the caller...

Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion

SummaryAny authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile authorization gate unconditionally grants access through its shared-chat branch. It checks neither the requesting...

PYSEC-2026-2692 Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion

Summary Any authenticated user can permanently delete files owned by other users via DELETE /api/v1/files/id when the target file is referenced in any shared chat. The hasaccesstofile authorization gate unconditionally grants access through its shared-chat branch. It checks neither the requesting...