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CVE-2026-87996

Open WebUI: SSRF into internal services via DNS rebinding in the Playwright web loader

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.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Vendors
Open-webui Openwebui
Products
Open-webui Open Webui
CVE-2026-18690

Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections

An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical system collections being dropped and recreated without proper authorization.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-87997

Open WebUI: Any authenticated user can inject chats into another user's folder via chat completions

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.1, POST /api/chat/completions and POST /api/v1/chat/completions in backend/open_webui/main.py copied a client-supplied folder_id into a new chat without applying the folder write-access check used by the dedicated chat routes. An authenticated user who knew a shared folder identifier could inject an attacker-controlled chat into a folder where the user had read-only or no write access, causing the entry to appear to authorized folder readers. This issue is fixed in version 0.11.1.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Open-webui Openwebui
Products
Open-webui Open Webui
CVE-2026-87998

Open WebUI: Non-admin users can delete admin-owned external knowledge connections via knowledge base deletion

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.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Open-webui Openwebui
Products
Open-webui Open Webui
CVE-2026-18688

Out-of-Bounds Read in MongoDB Aggregation Framework Leads to Denial of Service and Potential Memory Disclosure

An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation pipeline stage. This could result in a server crash (denial of service) and may potentially expose a limited amount of memory contents.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-18687

Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial of Service and Index Corruption

MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-87999

Open WebUI: Any authenticated user can reach the Azure platform channel via server-side web fetch

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.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Open-webui Openwebui
Products
Open-webui Open Webui
CVE-2026-87818

GitPython 3.1.59 Local File Content Oracle via --no-index

GitPython 3.1.59 fails to restrict the --no-index option in the high-level diff API, allowing attackers to read arbitrary filesystem paths as repository operands. Attackers can combine --no-index with -I/--ignore-matching-lines to create a content-dependent Boolean oracle, repeatedly querying local files to recover single-line secrets through distinguishable success or error responses.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Gitpython-developers Gitpython Project
Products
Gitpython Gitpython
CVE-2026-77500

Windows Device Association Service Elevation of Privilege Vulnerability

Release of invalid pointer or reference in Windows Device Association Service allows an authorized attacker to elevate privileges locally.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
Windows 10 1607 Windows 10 1809 Windows 10 21h2 and 15 more