Bug 2556388 (CVE-2026-111767) - CVE-2026-111767 @modelcontextprotocol/sdk: @modelcontextprotocol/sdk: Unauthorized cross-session task access via taskStore
Summary: CVE-2026-111767 @modelcontextprotocol/sdk: @modelcontextprotocol/sdk: Unautho...
Keywords:
Status: NEW
Alias: CVE-2026-111767
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-20 18:52 UTC by OSIDB Bzimport
Modified: 2026-10-21 03:37 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-20 18:52:35 UTC 
MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.24.0 to before version 1.32.0, the experimental tasks feature (taskStore) did not check which session created a task. Clients sharing one InMemoryTaskStore could list, read and cancel each other's tasks. This issue has been patched in version 1.32.0.
Note You need to log in before you can comment on or make changes to this bug.