Bug 2556388 (CVE-2026-111767)
| Summary: | CVE-2026-111767 @modelcontextprotocol/sdk: @modelcontextprotocol/sdk: Unauthorized cross-session task access via taskStore | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | dschmidt, ikhan, jlanda, jwong, kshier, lchilton, omaciel, rbobbitt, rhel-process-autobot, rjohnson, sdawley, sfeifer, simaishi, stcannon, ttakamiy, watson-tool-maintainers, yguenane |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in the Model Context Protocol (MCP) TypeScript SDK (@modelcontextprotocol/sdk). The experimental task storage feature (taskStore) does not verify which client session created a given task when multiple clients share a task store. A remote attacker sharing the same server instance can exploit this flaw to list, read, and cancel tasks created by other sessions. This results in unauthorized information disclosure and disruption of task processing.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2558780 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-10-20 18:52:35 UTC
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