CVE-2026-71294: Deserialization of Untrusted Data

Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be instantiated. In plugins/comments/controllers/actions/CreateAction.php, a POST parameter obtained via trim-only sanitization is passed to with no restriction, reachable by any member with wri...

Open WebUI: A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder

Summary A user granted write access to a shared chat folder could permanently delete chats and messages belonging to the folder's owner. Deleting a folder cascades into the owner's chats and the entire subfolder subtree, and the deletion handler required only write access on subfolders instead of...

GHSA-3CG5-48J3-V4GV Open WebUI: A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder

Summary A user granted write access to a shared chat folder could permanently delete chats and messages belonging to the folder's owner. Deleting a folder cascades into the owner's chats and the entire subfolder subtree, and the deletion handler required only write access on subfolders instead of...

CVE-2026-70494

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.10.0 until 0.11.0, the DELETE /api/v1/folders/id handler in backend/openwebui/routers/folders.py allowed a user granted write access to a shared chat folder to permanently delete chats and messages...

Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup

Summary A user with write access to one knowledge base could delete directories, and drop file embeddings, belonging to knowledge bases they do not control. The sync cleanup endpoint verified write access on the knowledge base named in the URL and then acted on the directory and file ids supplied...

CVE-2026-70488 Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objec...

CVE-2026-70481

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access i...

Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages

Summary On standard channels, the message update and delete handlers accepted any caller holding write access on the channel, without checking that the caller wrote the message. Write access is the same grant a member needs in order to post, so every ordinary participant in a shared channel could...

GHSA-MJ5R-JF49-M3W7 Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages

Summary On standard channels, the message update and delete handlers accepted any caller holding write access on the channel, without checking that the caller wrote the message. Write access is the same grant a member needs in order to post, so every ordinary participant in a shared channel could...

CVE-2026-70481

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access i...

EUVD-2026-52882

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access i...

CVE-2026-70481 Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access i...

CVE-2026-70481 Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access i...

CVE-2026-70481

CVE-2026-70481 affects Open WebUI prior to 0.11.0. In standard channels, the update and delete message handlers allowed any user with write access to a channel to rewrite or permanently delete other users’ messages, because the standard branch checked only write permission, not message authorship...

Open WebUI: Model meta.knowledge read-only file access can be upgraded to file write/delete

SummaryCurrent main and v0.9.6 still allow an authenticated user to turn read-only access to another user's file into write/delete access by attaching that file ID to an attacker-controlled workspace model.This is an incomplete-fix variant of GHSA-vjqm-6gcc-62cr. The current fix adds...

Open WebUI: Upload `metadata.knowledge_id` bypasses the knowledge-base write-access check (read-only users can add files to KB)

Open WebUI upload metadata can add files to knowledge bases without write permission SummaryOpen WebUI's file upload background processing trusts the client-supplied metadata.knowledgeid value and inserts a knowledgefile association before validating that the uploading user has write access to th...

PYSEC-2026-3593 Open WebUI: Upload `metadata.knowledge_id` bypasses the knowledge-base write-access check (read-only users can add files to KB)

Open WebUI upload metadata can add files to knowledge bases without write permission Summary Open WebUI's file upload background processing trusts the client-supplied metadata.knowledgeid value and inserts a knowledgefile association before validating that the uploading user has write access to t...

sssd: sssd: sudo LDAP provider searches entire directory tree for sudoRole objects by default, enabling privilege escalation

A flaw was found in SSSD's LDAP sudo provider. When the ldapsudosearchbase option is not explicitly configured, SSSD searches the entire LDAP directory tree for sudoRole objects. An authenticated attacker with write access to any subtree can inject a sudoRole object granting root-level sudo...

PT-2026-67834

Name of the Vulnerable Software and Affected Versions Open WebUI versions 0.5.0 through 0.10.9 Description In standard channels, the message update and delete handlers fail to verify if the caller is the original author of the message. Since write access is the same permission required to post a...

CVE-2026-70488: Authorization Bypass Through User-Controlled Key

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objec...