PT-2026-118611 · Npm · @Modelcontextprotocol/Sdk
CVE-2026-111767
·
Published
2026-10-20
·
Updated
2026-10-21
CVSS v3.1
8.6
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L |
Name of the Vulnerable Software and Affected Versions
@modelcontextprotocol/sdk versions 1.24.0 through 1.31.0
Description
The experimental tasks feature (
taskStore) fails to verify which session created a specific task. Consequently, clients sharing a single InMemoryTaskStore can list, read, and cancel tasks belonging to other clients.Recommendations
Update @modelcontextprotocol/sdk to version 1.32.0 or later.
As a temporary workaround, remove
taskStore or create one InMemoryTaskStore per session.
Stop using the experimental tasks feature as it has been replaced by a redesigned extension.Fix
IDOR
Missing Authorization
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Related Identifiers
Affected Products
@Modelcontextprotocol/Sdk