Detections
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SCA: security update for @storybook/addon-mcp, @storybook/addon-vitest, @storybook/core, @storybook/core-server, @storybook/experimental-addon-test, storybook (GHSA-px85-f4q5-jh77)

high Tenable Cloud Security Plugin ID 476824

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0
 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, the Storybook development server can expose its
 WebSocket authentication token to clients able to load its HTML pages over a local network. A LAN attacker
 can obtain the token and invoke WebSocket-backed file-writing or testing functionality. Weak story-write
 validation can allow code to be placed in story files. If the Storybook Vitest addon is installed with an
 old version of Vitest, the payload can use a Vitest API to write additional files or execute commands.
 Depending on the payload and local tooling, the attack can lead to code execution with the developer's
 privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6. (CVE-2026-114126)

Solution

Update the @storybook/addon-mcp library and its related packages to version 10.6.2 or later.

See Also

https://github.com/advisories/GHSA-px85-f4q5-jh77

Plugin Details

Severity: High

ID: 476824

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/22/2026

Updated: 10/22/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.51

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-114126

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/22/2026

Vulnerability Publication Date: 10/21/2026

Reference Information

CVE: CVE-2026-114126