CVE-2026-9812 Missing property field ownership validation in Playbooks run property update endpoint

Mattermost versions 11.9.x = 11.9.0, 11.8.x = 11.8.4, 11.7.x = 11.7.7, 10.11.x = 10.11.22 fail to validate that a property field belongs to the specified run before updating its value which allows an authenticated user with run property-management access to crash the Playbooks plugin via a REST...

EUVD-2026-76989

CAPEv2 through commit 471ee4b fails to validate task ownership in REST API endpoints, allowing authenticated users to read and delete analyses submitted by other users. Attackers can enumerate all tasks in the system and delete arbitrary analyses by sending requests to task view and delete...

CVE-2026-82290 Chainlit Feedback Endpoints Missing Ownership Validation

Chainlit through 2.12.0 fails to validate ownership of feedback records in PUT and DELETE endpoints. Authenticated attackers can delete or modify other users' feedback by supplying arbitrary feedback identifiers, corrupting human-rating data used for model evaluation...

EUVD-2026-67811

Quivr through 0.0.322 fails to validate ownership in prompt endpoints, allowing authenticated users to modify any prompt by identifier. Attackers with read-only access to shared brains can read exposed prompt identifiers and overwrite system prompts affecting all brain users...

CVE-2026-82280 Quivr Prompt Endpoints Missing Ownership Validation

Quivr through 0.0.322 fails to validate ownership in prompt endpoints, allowing authenticated users to modify any prompt by identifier. Attackers with read-only access to shared brains can read exposed prompt identifiers and overwrite system prompts affecting all brain users...

Session Hijacking

MCP Ruby SDK is vulnerable to Session Hijacking. The vulnerability is due to missing session ownership validation in StreamableHTTPTransport, allowing attackers with a stolen session ID to execute tool calls within the victim's session...