CVE-2026-47068 (GCVE-0-2026-47068)
Vulnerability from cvelistv5 – Published: 2026-05-20 13:35 – Updated: 2026-05-27 15:41
VLAI
EPSS
VEX
Title
Cross-session PubSub topic injection via URL parameter in phoenix_storybook
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 13:59 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
EEF
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/phenixdigital/phoenix_storyboo… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-47068.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-47068 | related |
| https://github.com/phenixdigital/phoenix_storyboo… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phenixdigital | phoenix_storybook |
Affected:
0.4.0 , < 1.1.0
(semver)
cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:* |
|
| phenixdigital | phoenix_storybook |
Affected:
8c2c97b0f505780fee4069988bf86736f51d35d7 , < 6ee03f1c738d4436dde1b066cf65c80663d489f5
(git)
cpe:2.3:a:phenixdigital:phoenix_storybook:*:*:*:*:*:*:*:* |
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