Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:
- The Model Context Protocol TypeScript SDK provides TypeScript client and server implementations of the
Model Context Protocol. From 1.6.0 until 1.32.0 in @modelcontextprotocol/sdk, from 2.0.0 until 2.3.0 in
@modelcontextprotocol/server, from 2.0.0 until 2.0.2 in @modelcontextprotocol/express, and from 2.0.0
until 2.3.1 in @modelcontextprotocol/server-legacy, server-side bearer authentication could accept a valid
access token issued for a different service because the SDK did not enforce the token audience. The
affected surface is server-side HTTP bearer authentication. The trigger is a valid token whose audience
names another service. The authorization server must issue tokens for multiple services, and the
application's verifyAccessToken() must not independently validate aud. Applications already validating aud
inside verifyAccessToken() are not affected. An attacker with a token for another service could
authenticate to the MCP server and obtain the confidentiality and integrity capabilities granted to an
authenticated caller. Upgrading alone leaves the new audience validation disabled. Operators must enable
audience validation and provide the token audience together. Enabling only the expected audience check
causes every request to receive HTTP 401. This issue is fixed in @modelcontextprotocol/sdk 1.32.0,
@modelcontextprotocol/server 2.3.0, @modelcontextprotocol/express 2.0.2, and @modelcontextprotocol/server-
legacy 2.3.1. (CVE-2026-111771)
Solution
Update the kibana-9.3 library and its related packages to version 9.3.8-r7 or later.
Plugin Details
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:N
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 10/20/2026