GHSA-HP5M-24VP-VQ2Q Open WebUI's responses passthrough endpoint lacks access control authorization

Summary The /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM providers without enforcing per-model access control. While the primary chat completion endpoint generatechatcompletion checks model ownership, group membership, and...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization in the basemodelid process. An attacker can gain unauthorized access to restricted models by creating a new model that chains to a restricted base model and invoking it, causing the serv...

Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining

Base Model Routing Bypasses Access Control via Model Chaining Affected Component Model chaining via basemodelid: - backend/openwebui/routers/models.py lines 170-214, createnewmodel - backend/openwebui/routers/models.py lines 254-308, importmodels - backend/openwebui/main.py lines 1696-1711, base...

Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Poisoning

Redis Cache Keys toolservers and terminalservers Missing Instance Prefix Enable Cross-Instance Cache Poisoning Affected Component Tool server and terminal server Redis cache: - backend/openwebui/utils/tools.py line 841, toolservers SET - backend/openwebui/utils/tools.py line 850, toolservers GET ...

GHSA-3X8W-4F7P-XXC2 Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Poisoning

Redis Cache Keys toolservers and terminalservers Missing Instance Prefix Enable Cross-Instance Cache Poisoning Affected Component Tool server and terminal server Redis cache: - backend/openwebui/utils/tools.py line 841, toolservers SET - backend/openwebui/utils/tools.py line 850, toolservers GET ...

Missing Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Missing Authorization via the createfolder process. An attacker can create unauthorized folders in another user's account, potentially flooding the victim's folder tree or planting phishing content, by...

GHSA-HR43-RJMR-7WMM Open WebUI's Mass Assignment via Pydantic extra='allow' Allows Creating Folders in Other Users' Accounts

Mass Assignment via Pydantic extra='allow' Allows Creating Folders in Other Users' Accounts Affected Component Folder creation endpoint and form model: - backend/openwebui/models/folders.py lines 72-77, FolderForm with extra='allow' - backend/openwebui/models/folders.py lines 95-106,...

GHSA-2R4P-JPMG-48F4 Open WebUI has an LDAP Empty Password Authentication Bypass

LDAP Empty Password Authentication Bypass Affected Component LDAP authentication endpoint: - backend/openwebui/routers/auths.py lines 468-477, user bind with empty password - backend/openwebui/models/auths.py lines 58-60, LdapForm model Affected Versions Current main branch commit 6fdd19bf1 and...

Improper Authentication

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Improper Authentication in the LdapForm process. An attacker can gain unauthorized access to any LDAP user account, including administrative accounts, by submitting a valid username with an empty password to...

CVE-2026-42181 Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP...

CVE-2026-42181

Lemmy prior to 0.19.18 is vulnerable to SSRF through post link metadata: the system validates the top-level URL against internal ranges, but the og:image URL extracted from the page is not subjected to the same restriction. An authenticated low-privileged user can post a page whose og:image point...

CVE-2026-42181 Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP...

CVE-2026-42181

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP...

EUVD-2026-28820

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP...

CVE-2026-42181 Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image

Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level page URL is checked against internal IP...

GHSA-GF5M-WCRH-7928 open-webui Vulnerable to Stored XSS via Model Description

!IMPORTANT Relationship to CVE-2024-7990 CVE-2024-7990 issued by huntr.dev, March 2025 describes a stored XSS in the same field — the model description — but exploits a different bypass mechanism: a second-order injection through the sanitizeResponseContent function's video-tag placeholder...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS in the sanitizeResponseContent process. An attacker can execute arbitrary JavaScript in the browser of another user by crafting a malicious model description containing a markdown lin...

NPM: open-webui Vulnerable to Stored XSS via Model Description

NPM: open-webui Vulnerable to Stored XSS via Model Description vulnerability discovered by ? in WordPress Npm open-webui versions = 0.8.12...

CVE-2026-41511 OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle

OpenMcdf is a fully .NET / C library to manipulate Compound File Binary File Format files, also known as Structured Storage. Prior to version 3.1.3, OpenMcdf does not detect cycles in the directory entry red-black tree of a Compound File Binary CFB document. A crafted CFB file with a cycle in the...

Electerm Security Vulnerability: RCE via malicious SSH server filename in openFileWithEditor

Impact A code execution RCE vulnerability exists in electerm's SFTP open with system editor or "Edit with custom editor" feature. When a user opts to edit a file using open with system editor or open with a custom editor, the filename is passed directly into a command line without sanitization. A...