Recommended action window: Monitor and triage in normal cycle
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
‼️ Storybook dev servers expose a WebSocket token to anyone on your LAN. CVE-2026-114126. The token allows code injection into story files. Fixed in 8.6.19, 9.1.21, 10.6.2 and 11.0.0-alpha.6. Is your dev server on a shared network? https://github.com/advisories/GHSA-px85-f4q5-jh77
🔴 Storybook, WebSocket Token Exposure and Code Injection, #CVE-2026-114126 (High) -DC-Oct2026-3662 https://dailycve.com/storybook-websocket-token-exposure-and-code-injection-cve-2026-114126-high-dc-oct2026-3662/