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In limbo for 42 days

GHSA-fmmv-w9g8-j3gc

mcp on PyPI · published in modelcontextprotocol/python-sdk

Read the advisory on GitHub ↗

Fixed in 1.29.1. Dependabot, npm audit and OSV-Scanner won’t flag this yet. Find it in your project

Facts

Severity
High · CVSS score 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected versions (mcp)
< 1.29.1As entered by the maintainer. Not reviewed.
Fixed in (mcp)
1.29.1
Affected versions (mcp)
>= 2.0.0, < 2.1.0As entered by the maintainer. Not reviewed.
Fixed in (mcp)
2.1.0
CVE
CVE-2026-109527 · published
GitHub Advisory Database
Not reviewed
OSV.dev
Not present
Other CVEs pointing here
None found in the CVE List

If you use mcp < 1.29.1

Upgrade to 1.29.1 or later. Dependabot, npm audit and OSV-Scanner won’t flag this yet.

Timeline

  1. 2026-09-30 20:53 UTC

    Published by the maintainers

    Cites CVE-2026-109527

  2. 2026-10-28 07:21 UTC

    First seen by Limbowatch

    not reviewed · not in OSV

  3. Waiting

    Reviewed by GitHub

  4. Waiting

    In OSV; scanners can see it

Machine-readable record: feed/GHSA-fmmv-w9g8-j3gc.json