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Fencer Intel
high 8.6

CVE-2026-111767 json

MCP TypeScript SDK: Experimental tasks were not tied to the session that created them

published 20d ago modified 20d ago also EUVD-2026-105256 , GHSA-22jm-h49p-29qw

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm @modelcontextprotocol/sdk 1.32.0
  • lfprojects mcp_typescript_sdk 1.32.0

Is CVE-2026-111767 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-111767 updated cvss 6.3

@modelcontextprotocol/sdk: @modelcontextprotocol/sdk: Unauthorized cross-session task access via taskStore

  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-27/mcp-server-rhel9, ansible-automation-platform-tech-preview/mcp-server-rhel9 Red Hat OpenShift AI (RHOAI) rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 Red Hat OpenShift Dev Spaces devspaces/code-rhel9
    affected: workaround, no fix available
  • Red Hat Migration Toolkit for Applications 8 mta/mta-solution-server-rhel9
    not affected: component not present
  • Red Hat Enterprise Linux 10 goose 1.38.0-1.el10_2, grafana 12.4.3-2.el10
    not affected: vulnerable code not in execute path
  • Red Hat Hardened Images grafana13.1 13.1.7-0.2.hum1, grafana13.2 13.2.3-0.3.hum1, grafana12.4 12.4.12-0.5.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
20d ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
GitHub 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Affected packages

ecosystem package affected fixed in
npm @modelcontextprotocol/sdk
>=1.24.0, <1.32.0
1.32.0

Affected products

  • modelcontextprotocol typescript-sdk

Classification

Weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key
  • CWE-862 Missing Authorization

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.