Authorization Bypass Through User-Controlled Key vulnerability in phenixdigital phoenix_storybook allows cross-session PubSub topic injection via a URL query parameter.
'Elixir.PhoenixStorybook.Story.ComponentIframeLive':handle_params/3 in lib/phoenix_storybook/live/story/component_iframe_live.ex reads a PubSub topic directly from params["topic"] and broadcasts {:component_iframe_pid, self()} on it with no check that the topic belongs to the requesting session. The shared PhoenixStorybook.PubSub is used to coordinate playground LiveViews with their iframes: a playground subscribes to a session-specific topic and uses the received iframe pid to direct subsequent control messages (variation state, theme switches, extra-assign payloads) via send/2. Because the iframe trusts the query parameter, an attacker who loads /storybook/iframe/<story>?topic=<victim_topic> causes their iframe process pid to be announced on the victim's topic. The victim's playground then addresses its private messages to the attacker's iframe process.
This issue affects phoenix_storybook from 0.4.0 before 1.1.0.
CVSS
No CVSS.
References
Configurations
No configuration.
History
21 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/phenixdigital/phoenix_storybook/security/advisories/GHSA-mrhx-6pw9-q5fh - |
20 May 2026, 14:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-20 14:17
Updated : 2026-05-21 15:16
NVD link : CVE-2026-47068
Mitre link : CVE-2026-47068
CVE.ORG link : CVE-2026-47068
JSON object : View
Products Affected
No product.
CWE
CWE-639
Authorization Bypass Through User-Controlled Key